We have dealt with this situation. I've made a request to unban accounts spider703 and Mr.Spider703. And I have nothing to apologize for. I'm doing my job. It is you who should monitor the status of your account, not the forum staff.
Indeed, nothing to apologize for. Actually...
How can a hack be proved? A signed message could prove the account is now held by the original owner, but there's no way to prove it wasn't under his control at some time. It's trivial to change one's IP address to simulate someone else accessed the account.
I hope this alleged hack is recorded. If this happens again I think the ban should be permanent.