2021 and In-app Purchase doesn’t work – Wav Voice Tune Review

I tried every option to buy or upgrade and none of the buttons would work. So I couldn’t upgrade at all which seems kind of strange. I even tried on three different devices but CANT PURCHASE ANYTHING. It looked pretty cool too ....oh well. I have an iPhone 12 Pro Max so I think it should be enough but still no purchasing ability or unlocking
Review by Eri143 on Wav Voice Tune.