Sometimes a double payment is showing, but one is ' pending ', so will eventually disappear , and you'll be charged for one.
If you see this is not happening after a few days, contact Customer Services, they have full access to your account and can see what has been charged.
This is the easiest and quickest way to contact eBay Customer Services, for a Call Back option.
https://www.ebay.co.uk/help/eua?id=5275&mkevt=1&mkpid
Lines open 8 a.m. - 10 p.m. on weekdays
9 a.m. - 6 p.m. on weekends.
Automated agents will be available on chat outside of the above hours.
I recommend contacting CS first thing in the morning as there's more chance of Dublin answering.
@carolsandrabradberry