Hello Maurizio.

You can check in our documentation about wpDataCharts callbacks. 

• Every chart exposes several options that customize its look and feel. Charts usually support custom options appropriate to that visualization. wpdatachart callbacks  allows adding options that are available in Google Charts API, Highcharts API and Chart.js API. 

• All necessary resource are available in charts engines API (depends on which one you use). Every engine has different approach of charts settings. In wpdatachart callbacks you have to adopt those settings to wpdatachart object(you can take a look an example for each engine in our documentation and also in Support help center). Huge number of examples for any area of programming you can find on stackoverflow.com(typing your problem in google and of the end add site:stackoverflow.com and google will search only on that website) and also a lot of resource of examples of chart, chart settings and customization you can find on jsffidle. net(typing in google for example line chart highcharts jsffidle)
• Please note that using hooks or wpdatatable and wpdatachart callbacks requires certain level of programming skills and included support refers only to advises.

You can take a look at this link to go straight to annotations.

Please let me know if this helps.

Best regards.

Hello again Maurizio.

I inspected all three pages, and saw that wpDataTables shouldn't be causing this (see attachments). It shows "documents" loading for approx. 20 seconds. And it doesn't lead anywhere - when I click on the document name, it takes me to the actual page, unlike any other file listed below, which shows the source file. 

That leads me to believe that there is a conflict with a plugin, or most likely a theme. Could You please change the theme and try again?

Please let me know.

Best regards.

Hello Maurizio.

First of all, sorry for late response. 

Our company is located in Serbia and our working time is from 10:00 to 17:00 CET. business days. Also, we've had non-working days until January 07th.

Yes, please provide me with the web-site credentials, PHPMyAdmin credentials, and if You can check Your server log for any errors or warnings and attach it to Your response. With everything but wpDataTables disables, there shouldn't be this many issues with loading the page. What is Your server upload limit set to?

Best regards.

Hello again Maurizio.

We're sorry to hear you do not want to use the tool after purchase.

I would gladly have checked Your website for any issues on the plugin's side if You were to provide me with a temporary admin account, since (as I said) there is no reason why wpDataTables would be causing slow loading, especially if there are no, or there are very few, tables; and also there is no reason other than compatibility with another plugin or theme that would cause the table or chart not to display.

Did You check the console log for any errors when You tried to display the chart on a page? I couldn't open the links in Your previous answer, where You offered to provide me credentials, since there is an Outlook Web App log-in form (see attachment). 

If there is a "render-google.js?ver=3.1.2" error, then there is a fix for that.
You'd need to add a line of code in the .js file to get rid of the issue, since wpDataTables is using jquery 1.1.2 and (probably) a theme or a plugin uses 3.1.2 or 3.3.1 and that's why it can't display a chart.

Please try to insert this line of code in jquery.js file:

jQuery.fn.load = function (callback) { $(window).on("load", callback) };

Also, did You check Your server log; Your upload limit; with Your hosting provider?

We will be happy to help You with this, but if You would still want a refund, first please find our refund policy here: http://wpdatatables.com/help/refund-policy/

Due to the digital 'non-returnable' nature of goods we only do refunds when the tool is malfunctioning or not working as described, with prior confirmation that support is unable to resolve the issue. As the revoked license does not make the product non-functional, and because there were lots of abuses, unfortunately we cannot provide the 'return-on-request' refund policy. So we do not refund mistaken purchases, or cases when buyers had their own expectations of features.

To avoid such situations we have a fully-featured 'sandbox' site where one can try plugin's features before purchase, a free version of the plugin which can help to get a better understanding of how the plugin is working, all the plugin's documentation is available to anyone before purchase, and we try to clear up all the limitations of different features, and we always answer all pre-purchase questions clearly and honestly so that potential buyers would have clear understanding of how the plugin works.

You can open a refund request at https://codecanyon.net/refund_requests/new but please note that this is not something that refund can be given.

Thank you for understanding.