Crash Borean Tundra

I have a character called Cavacca (Warrior, lvl 68, Frostwolf), to which I can no longer play due to continuous and inevitable crashes, when I try to log in with the character. The bug started when I took the Zeppelin to Orgrimmar to Borean Tundra. The game on the way (in loading) has crashed, and from there I can no longer log with the pg (which happens to be in Borean Tundra. I ask one character unlock, or a redirect as well as clean the cache folder would not know what to do .
Thank you.