Nostalrius Begins - Quality wow vanilla realm (1.12)

So I logged in last night with no problems as per request of my friend who said he was having trouble logging in, and it worked fine so he came over and tried to log in his account from my computer and it gave him the banned message and afterwards I tried to log into my account and mine was banned too. Is there anything than can be done to fix this? I haven't played in over a week and when I logged in it was fine so I obviously didn't do anything to warrant a ban so I'm hoping that the situation can be cleared up. Thank you.