People’s Bank query

I am not happy with Nedbank and to make matters worse one needs to communicate with them via email for certain queries to be assisted. My grandfather was told his deceased mother’s estate has unclaimed funds. The lawyers assisting us told us the money is in People’s Bank account which later changed to Nedbank. Since November last year we have been going to different Nedbank branches and I have been calling to try find the correct department to assist us. I make it clear in the beginning that this is a People’s Bank issue but somehow they will want to find the holder in their usual Nedbank issue. We have been given a letter by the lawyers to share with Nedbank but no one seems to be clear on which department to give the letter to. I’m not happy and as someone that once worked at a bank I know that it’s possible to go as far back in the system but however at Nedbank no one seems to know