So after over a month and several emails and proof sent to Fyber I have decided to send in a formal complaint to BBB against Fyber.
If you are in a similar situation then I suggest you do the same. I know, it's just a game, it's not that important. But to me it's more about accountability and fair business practices. These kinds of companies are not in the public eye, and probably feel like they can get away with more. If you truly feel like you have a legitimate complaint, I suggest filing a complaint. Don't do it if you have no evidence or you just want to rant lol
They owe me 4200+ gems, which is nearly 100USD worth of gems in Racing Rivals, so it's a big deal in a way.
Here's a link if you feel compelled to file a complaint.
https://goldengate.app.bbb.org/complaint/new/444320?bbbID=1116