Happened to a friend of mine here. Took a month for the letter to arrive, leaving a month to sort it out. He's in his 80's and ill so could not fly home.
Fortunately, I managed to help set him up with a TWise Bank Account in London which we then arranged for his pensions to be paid into!!
I took the case up with the Banking Ombudsman but his Bank lied about 2 certain letters which were not sent and the Ombudsmans's 'investigator' believed them. No surprise there!!!????????????????????????????????