David,
I think we all understand your anger and frustration about what happened. Even over something worthless like the coins. A natural reaction as no one likes to be scammed.
You and others who this has happened to thinking it hadn't been brought up before and that WGT will do something about this ongoing problem now is a pipe dream, Regular reading of the forum might have kept this from happening to you this time.
Many people on this site are friendly, well meaning and honest. However some are not, and the scammers seem to flock to the mobile platform to do this. WGT shows no sign of doing anything about it. Beware in the future.
Again best advise now is to make friends and only play them for coins, etc.
Good Luck,
Jeff