Someone has a word in their name which is offensive. He/she says I can't report them. And if I do they will just change their name. They are a pretty hihg level as well. (93).

Yes, you can report the name.

 

Send the report abuse under offensive language. Try to have them talking on screen, althogh its not necessary.

 

 

 

They won't change the name. Never have, never will.

..or just add them to your ignore list and don't interact with and/or talk to them any more.

Wait until they talk and report them under offensive language and say "Player has offensive username" If it's bad enough and the person hasn't been playing too long they ban the account. Permanently.