I am sure you would know far better than fellow buyers and sellers if the amount debited matches an amount you have spent shopping on eBay
Is it from the last seller to leave you feedback?
Or
Have you changed the drop down menu in your purchase history to cover the date shown on your statement
Or
Does anyone else in your house use your eBay account and was logged in as you/used your credit card details to buy something?
Hard to give advice with no question asked really
