Poor Service from FNB Deceased Estates

We are the executors of a deceased estate. We have been waiting nine months for FNB to process the closure of the deceased's bank accounts. We have phoned many times and each time we get the same story, and that we will receive feedback within 48 hours, which has never happened. We have also sent multiple emails that have gone unread. It is unacceptable that it should take a bank this long to process our request. It makes it very difficult when there is no communication with the administrators, as they are the ones with the information that we need. These delays severely impact our ability to administer an estate, and makes us look like the ones who are not doing our job properly. This is extremely poor service from FNB.