Funds frozen

EBay has been holding on to my £65 for over 8 months..I sold an item that I bought on eBay for £65 over eight months ago..at the time they said my money will be on hold for about 2 weeks I think..Now it’s over 8 months and I still can’t get my money..whenever I try to withdraw they tell me to update my details which I’ve done at least 50 times with no success..I phoned customer service and one of their EBay employee tried with me to get my money released and he failed to do so..my details are correct but still they carry on holding to my money. 
ebay is determined to hold on to my £65. It is so frustrating that I’m considering them just keep my money..oh if I want to purchase something on eBay there’s absolutely no problem The money is taken immediately from my Bank with no problems..it’s exactly the same account that they are refusing to release my my money to.