eBay

i have had a few bad feedback lately from people wanting more than they got. They sent bad feed back complaining about the posting fees, and complaining they thought the item was something else. These people didnt even send me a msg to either ask for...

i sold an item, and the seller says he wont pay until i send an invoice. ebay and i have both sent invoices, and he still wont pay. what do i do.