I changed my ISP and the game started to disconnect everytime i try to get in.

Hey, recently I changed my ISP to a little bit worse one and my ping jumped from 130 to 170ms. This is not the issue at all, the issue is every time I try to connect it disconnects me, sometimes middle queue to icecrown and sometimes while playing but the disconnects are way too often. I cannot enter a dungeon without getting disconnected many times. I hope someone got any idea because on other games I don't get disconnected at all and not even close to how often I get disconnected in warmane.