Hello there,

Thank you for reaching out to us.

1. Regarding the refund option you can read more about it on this link https://wpamelia.com/configuring-payments/#refund this is for online options.

2. Please check if the on site option is tuned of in settings payment settings or if you use it for some services and for others you do not you need to check this for each service separately in the services edit service settings

Hope this helps.