How to report a problem with my yahoo answerws account-perhaps compromised?

Here's what happened: I received a viloation message about an answer which 1. I never remember having given, but perhaps it was too old, years ago, so perhpas I gave it and don't remember, and 2. there was nothing wrong with it, just sharing information based on experience from a medical problem. So I appeal the violation and I receive an email saying the appeal was accepted, sorry for the inconvenience etc. A couple of weeks later I receive AGAIN a violation message about th SAME answer. I try to appeal again, and I get the answer "this answer was not given by this account, log in with teh correct account to appeal". But i have no other yahoo account, plus the violation email was sent to my account and through that email itself I pressed the link to appeal. I think someone les is using my account, and I want to report the problem to yahoo but can't find how. Any ideas?