Account Hacked, requesting closure of account

I had stopped playing World of Warcraft on August 13th, a couple of days prior to my game time expiring, I noticed yesterday someone used the referr a friend program to put game time on my account, and i did not know the person. I then get a notice my account was suspended for 3 hours for spamming. I then check my characters and i notice a few characters on my account i did not create, on realms i do not play. I also notice my own characters remain intact, however i have unintalled world of warcraft to make disk room, so to check on them ill have to take several hours to redownload and install, but i have a month of game time i did not purchase still active. Apparantly the hacker was actually willing to pay to gain access to my account, i applaud him to be honest i mean, lol, he actually paid for 30 days of game time just to hack me lol. the friend linked to this account is nobody i know, and i request it be immediatly removed, and this game time i did not purchase, i request it be immediatly closed and my account reset back to when my last game time expired, as that was the last i played.