Did you purchase the Android or iPad tablet version?
I also want to return. I discovered too late that it was not compatible with my 1. gen ipad.
All iOS purchases are handled by Apple. After you make a purchase you should recieve a receipt in your email. In the the receipt email for the purchase is a link in the body of the email that says "Report a problem", if you click on this you can request a refund and provide an explanation why you want a refund. You can also contact them over the phone at (1-800-MY-APPLE).