Not to alarm you or anything, but given the recent breach it may be a good idea to find out what is going on. Your account should not be blocked. Good luck, TC
I agree. It could be a programming problem due to the breach. Maybe someone tried to get into your account, eBay detected fraud, and they locked you out because of it. Have you changed your password? You might be entering it wrong, or a hacker might have changed it for you. Call eBay, if they can't help, no one can.