1. Stat Reset does NOT reset fire team combos.
2. Is it in DT or CF? If it's in DT, tell them about the DT bug when a whole bunch spawned. This happened around 2008 and the beginning of 2009. There was actually a bug where you could spawn a whole bunch. But with the headshot rate, it's hard to make excuses. I'd just say make a new account or go to the Trade Section and try to buy an account. Thats your best bet. If you can't do either of those... Make a new account or stay clanless.