We do our best to make sure every customer is completely satisfied. So, we encourage you to download the software and test it out before you purchase it. After you’ve purchased, if you’re having technical issues, we encourage you to contact Mapdiva support.
If you are still dissatisfied, due to Mac App Store policies and restrictions, you’ll need to consult Apple’s iTunes Customer Support:
If a customer is asking you for a refund for the purchase of your app or is experiencing any issue with their account with billing or purchasing, you will need to direct them to iTunes Store Customer Support.
This will allow the user to directly resolve their specific App Store account issue and obtain a refund if necessary.