You are a new seller have you correctly registered for eBay's Managed Payments?
See here:
https://www.ebay.co.uk/help/help/selling/getting-paid/introducing-managed-payments-ebay?id=4795
As a new seller your payouts may be held for a longer period, 30 days, as eBay have nione of your selling history and wish to see the first few items safely reaching their buyers.
Have you tracking to show delivery? This will release the payouts sooner.
One more thing to try, just in case your money is Available for withdrawal, where the in ' withdrawal; is greyed out, have you at the top of that page written the exact amount where it says £0.00 , that you wish to withdraw?
@alex.watsonnn
