[CyberFonic]

He's not a customer, he is a egotistical, self-entitled jerk!

You did the RIGHT THING! offering a refund and staying polite.

We all get such jerks pretending to be customers from time to time. Not worth losing any sleep over nor wasting more time with emails.

If you can, set-up an auto-responder for that email domain:

"We are disappointed that our product fails to meets your needs. Please uninstall the app and accept our refund and you will no longer have any more problems with this app."

[anujseth]

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.