i keep getting banned

so i logged into valorant today to play comp and halfway thru the first game i get this error (the image attached) and it kicks me from the game. It proceeds to happen 2 more times with it banning me for 1 minute, 3 minutes, and now 15. Does anyone know what could have caused this? I logged onto my friends account today to help him finish a comp game but i dont think that could have caused it