Hi .. Its there because you purchased a item and haven't paid for it. Sellers incur fees when an item sells here and if not paid then they have a right to recover fee cost from ebay. That's the unpaid process and the dispute showing in your resolution center. Ebay allows 4 days to pay and if you do not , seller closes the dispute , ebay credits fees and assigns a strike against your account. 2 strikes and buying is severely restricted for 12 months.
Buyer's cannot cancel a transaction so never commit without full intention of following through and paying..