Virgin Active East London(Beachfront)

I have recently been getting messages from an attorney firm telling me that I owe Virgin Active for not paying my membership fee. Problem is I have never signed a contract with them nor have I ever been to Virgin Active East London (Beachfront).I requested them to send me the contract that I apparently signed but to this day they haven't sent it. I am sick and tired of calling them because they send me from pillar to post.This reflects badly on my credit history.<br> I need this sorted out soon.