In Game Crash

Well, as I was trying to play normals, I'm in the loading screen then once done, I'm in the fountain. But one second later, game crashes. After this, I try over and over again for 35 minutes strait, and no luck came to me. most likely getting a ban and most likely gonna stop playing for a month. It sucks to get banned for 20 minutes 5 times. It also gets very, very annoying. please help .