How is it going to ruin your name? 

Theres no evidence it ever happened on your account, and its not like any more than maybe 3 people out of millions might remember you - one who won an auction that was cancelled and two others who might remember an auction they asked a question about but didnt win.  Sounds like a normal Ebay day to me.

Im pretty sure you have zero to worry about.

If youre really paranoid though, you can always change your Ebay name (go to My Ebay > Account).