Very unhappy and ripped off!

After several failed attempts at restoring my premium purchase of this app to clear the adverts, I have broken down and repurchased the app. I am annoyed at having to have to do this.
I am even MORE annoyed that paying the second time for the premium version of the app has not cleared the adverts nor allowed me to regain the advanced features. I am thoroughly unhappy. Apple confirmed that I had indeed paid twice and refunded one purchase, for which I am happy. But repeated attempts to have the developers remedy the problem that the app will not allow me to restore my initial purchase of the full app have gone nowhere. DO NOT BUY THIS APP!

Def Sufi about اذان - Farsi Azan Quran (نماز و قرآن فارسي ايراني)