ABSA Deceased department NO customer service at all!

My husband passed away at the end of May 2022. I have sent the documents through that they requested and now they are asking for the third time for the same documents, via the Private banker. I have not received any email response from them at all in the 3 months stating that they have received the payments that I have made. Which I requested in my email. The executor has also requested for statement in June so that we can work on my husbands tax return and she has still not had a response to date. I have requested for final statements so that I can settle my husbands bind and the credit card and via the private banker have been told that the executor needs to request these. They are not even responding to the Executor's requests. The service is shocking and no customer service at all!!! I spoke to the Private banking department the other day to get phone numbers- 2 of which do not work and the other one is always engaged. How does a bank operate like this. The customers mean nothing to them???? Surely they should be happy to get the accounts settled or are they just interested in making more interest out of the customers. I am a very unhappy customer. Maybe they don't want business, and I should look at moving banks?