My account hacked and played using third party software got me banned

Somehow someone got a hold of my information and played two ranked matches and won both at level 11. I noticed this when I came back to the computer and the client told me someone had logged into my account on the client on another computer. I logged back in several times and caught someone starting a third ranked match that wasn't being played by me. I checked my match history and found these and was wondering why at first had this person played my account just to win them. I got a message on the client saying that my account was suspended, and when I tried to log back in, it said my account had been banned for using malicious third party software.

Anyone else out there get something similar to this experience?