Synchronization error when trying to connect multiplayer

Hey i cant play Cod4 remastered for a while now and i think that its just a soft ban. Iv been banned for changing my levels before the game even had vac. Or is there anyway to fix it? Can i reset everything somehow? Anything? I would like to play some tdm!

Family Share the game to another account. You will be level one, but that's how I fixed it for myself. Still, I wish I had my main because I did hack regal camo and stuff lol