Have you checked all your details are correct,as misspellings and names have to match,especially when verifying your bank account.Registering as a seller | eBay
Also check your phone number and verify your email address.
These are all part of the ebay managed payment process,see here,as you have had a break from selling,https://www.ebay.co.uk/help/help/selling/getting-paid/introducing-managed-payments-ebay?id=4795
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