Won't support customizations

Decent plugin but support is not the greatest. I paid for the premium version and also paid DotOnPaper to do some minor customizations. Since then the customizations have stopped working and when I reached out to support and offered to pay them to make some fixes they told me they won’t do it and to hire another developer. I understand not wanting to support customization, but it’s disappointing to be left high and dry with a broken plugin.

I looked at using WooCommerce bookings, in hind sight this might have been the better course of action. They stand behind their software and have good support.