Have been offering a refund from day 1 (months back) and the person just keeps finding more problems/feature requests but won't take their money back. We rarel

Have been offering a refund from day 1 (months back) and the person just keeps finding more problems/feature requests but won't take their money back. We rarely get these, most users love our apps and repeatedly tell us our customer support is exceptional. I will consider the auto responder thank you.