You sure it was hacked and that you weren't banned?

If you are sure it was "hacked" (or taken from you in any other way), I believe you can call up SoE customer service and with the credit card info and 2 of the CD-Keys you used in the account (only one i would assume if you had no expansions) they will give it back to you. I seriously doubt they will give back any items taken and/or give back any characters deleted though, so I'm sorry to hear that that happened to you.