Hi, something or someone reset my level and all my achievements. How to get them back?

I haven't played this game in a while and the first match I got into was fine. Up until the point no one was in the lobby that had the same user name as me but was sending messages like it was me with my username. What is this and what could it be? I haven't seen anything like this in a old cod game yet?...

если кого обнулили и кто смог восстановить все утерянное пишите сюда .

Adding as many as I can who still play this game so we can get a good team going, reply if interested (must have discord)

meine Gansen Erungenscgafften wurden gelöscht und ich hab keine Ahnung wie wer könnte mir da weiter helfen