QuickVoice pro – QuickVoice2Text Email (PRO Recorder) Review

I just purchased this product for my iPhone version 5.S, iOS version 10.3.2 with plenty of memory available. The product works standalone however, when I tried to record during the phone conversation I get a message saying "an unknown Recording error has occurred" How do I how do I resolve this or get my money back?
Review by No nickname no patience on QuickVoice2Text Email (PRO Recorder).