Hello Hussain.

Thank you for your purchase.

Have you configured the timezone correctly in WordPress settings? Amelia uses the WordPress date and time settings, and there are no settings within the plugin to configure this.

As for the back option - when you open the booking form, you get to choose the Service and employee:

Then, when you click on continue, you get the calendar:

but the first menu is still displayed on the left, so there's no "back" to go to. And once you get to the final screen, you can click on "Cancel", and it will bring you back to the calendar view:

You can add the cost to each service individually, but it cannot be changed in the booking form, if that's what you're asking.

Best regards.