This is when they moved your accounts as they were linked to your other halfs?
So did they move them back? If yes, then whats the point of this. Halifax did the opposite to this to me, that I changed address, went in with my savings account as ID, and they only moved the saving account, which meant I then got a lot of letters weeks later about huge charges I could have stopped. They offered an apology, compensation for failing to honour a cheque which would otherwise have been covered, and at that point, having spent best part of couple of hours sorting it out, felt the matter ultimately resolved.
It shouldnt have happened, they apologised, end of. I didn’t demand “specific” apologies, or forensic investigations. Nor did I epxect them to wear sackcloth and ashes for me.
If you had an issue, and they sorted it out, then whats the problem?