If the charges do not match the amounts for items you have purchased, and you have not signed up to anything, you need to contact your bank right now and report them as unauthorised charges so they can cancel your card and investigate 

You say 8 charges, you have 8 feedback left for you for that time period

Are you sure they are not for those purchases ?

Remembering you 'pay' eBay (commerce) and they 'pay' the seller

Does it actually say 'fee'?

A long time to wait if you do not know what they charges are for