Hi prokopis,
Thanks for your interest and for checking on the refund policy before purchasing.
We can provide refunds in some situations. However, we expect potential buys to read through our FAQs, tutorials, product pages, etc. to make sure the plugin has the functionality you’re looking for. If you buy a plugin and aren’t satisfied with the functionality when that was explicitly stated in the documentation, we unfortunately won’t be able to provide a refund. Please also note that we cannot provide refunds in any circumstances if it has been 30 days or more since your purchase.
I highly recommend that you download the free plugin, The Events Calendar, and play around with it to make sure you like it. Then you can choose from there if you want to purchase one of the premium add-ons. Also, you can always ask questions in this forum before you purchase.
Cheers,
Leah