Didn't play for 2-3 months, banned?

Greetings,
Today I tried to log in to my account and couldn't get through the log in phase and resetted my password. I was able to login but it says that I am banned. I wasn't even playing for at least 2 months if I remember correctly. My character was not even level 20 I think. What was the reason for the ban?
Character name: Gistus - on the pvp realm horde side
Today I tried to log in to my account and couldn't get through the log in phase and resetted my password. I was able to login but it says that I am banned. I wasn't even playing for at least 2 months if I remember correctly. My character was not even level 20 I think. What was the reason for the ban?
Character name: Gistus - on the pvp realm horde side