Account hacked, and was sold?

So I recently got an email telling me I bought Starcraft II WoL. Cool beans, accept, I didn't.

:S

I had my account stolen once before, which was a bit upsetting. I changed my email over to a new one, using a new computer, so all my info atm is nice and safe. My problem is I got emails from "Blizzard Entertainment" as the sender, for the SC2 and something regarding my account security.

Then an hour or so later I got another from [email protected] mentioned that they're investigating my account being traded or something similar. While I don't play much anymore, I'd never trade this account just because of all the good times I've had with it. My question is:

Should I be worried my Bnet account is going to get permabanned from everything? If I should be, what kind of methods take/who should I contact to see that this doesn't happen.