if you contacted support about the issue of not receiving your gems from an offer, Fyber support may have contacted you again to follow up on the status of your offer. Either way, you can always talk to the Fyber agent to find out exactly what kind of proof they need.
You are right! This post is NOT invisible for some odd reason. Ryyst is looking into the deleted posts issue, if you are experiencing any other issues that are forum related please let us know with a post! Otherwise, you can contact support with the "?" in game.
Those two aspects of the game are handles by entirely different teams and adding something does not hinder a bug from being fixed in its place, but thank you for your insight and suggestions.
No worries. If you get desynced at any point, you contact support for assistance with the "?" in game. http://forums.racingrivals.com/rivals/discussion/206503/looking-for-assistance-account-issues#latest