Have you unintentionally opened another account ? --- Reported to happen when using Phones /Apps to log in resulting in opening a 'cloned' account with lost history/missing/corrupted details.
Your current posting account Feedback shows 13 purchases this Month --- nothing sold for more than a year.
Using a PC/Laptop, try to recover the Original account/history with a fresh login > www.ebay.co.uk < Homepage login and previous/usual email/Username/s/Password/s etc. --- any new account can remain unused or closed.
