Nedbank deceased estate department and client experience department

I often deal with estates in my capacity as executor. I am under the impression that Nedbank is making a habit of delaying the payment of funds held by them on behalf of the deceased. I am able to provide proof that this is the case with other deceased estates. Repeated emails to their client experience department proves to be fruitless, they just do not react sensibly!! I experience this to be extremely poor service and would like to know how Nedbank and their deceased estate department regard the situation of heirs in an estate. Nedbank owes the public a motivated explanation which goes beyond their usual superficial apologies not being followed up by any action. In the current case the deceased passed away during July 2021. We need transparency from Nedbank.