I set up a Hotmail account for sites like ebay etc and only give my 'real' email address out to family and friends.
Set up a hotmail accnt ( free) chaange your ebay details to your hotmail accnt and at least that will free up your real accnt.
Unsubscribe to any watched / favourite bidders etc
I would hope that after the items drop off in a few weeks time the mails should stop.
Worth a try