See info on here:
https://www.ebay.co.uk/help/selling/fees-credits-invoices/updating-your-bank-account-details?id=4796

 

If you need to contact ebay about it you can ring them or request they ring you on your phone only, not on a laptop or PC.     So view this link on your phone:
https://www.ebay.co.uk/help/eua?id=5190

 

@michelledyer1985