Just for the record, I do tend to believe what you saying is correct, in regards to the probability of his "compromised credentials" and it can be found in my previous reply.
I was looking for the other "victims" but I see nobody yet. I, however, did tag the account for now (although it has been inactive), the app has been there for nearly 5 years, it has 45,755 reviews on Google Play (most are positive), so your accusation here is a bit weak, as I explained in the local board you should show some evidence, those need to be sent to Google Play as well, I mean tens of thousands of people use this app if what you claim is true, then the amount scammed will be pretty HUGE and the number of victims will be massive (sadly)
I will keep the tag for a while, I will remove it if they respond or if a few days pass without anyone else besides you accuse them of scam.
But why would you say this
For full disclosure 2 of his mates also from the same African country reported this issue.
Why are you revealing your client's information that is unnecessary for this matter and is PRIVATE? is that how you handle your clients' information?
I will remove the tag since you did respond and since I see no more victims, but I would like to see what does the community thinks about you revealing this information in a terrible manner.