No respect and dignity from Nedbank

My son passed away three years ago, my daughter is the executor she handled his estate and all the documents, she handed my son's death certificate and relevant documents to the Meyerton branch, and somehow somebody did not do his or her work. For the past three years we are still getting calls from Nedbank asking to speak to Shaun regarding his account, We are grieving about our son and we constantly have to explain that he passed away. Now Nedbank handed the account over to attorneys, My daughter received a call from them on Friday, the lady that called was VERY RUDE AND HAD NO COMPASSION, all she asked for was to speak to Shaun, my daughter explained that she handed all the documents numerous times to Nedbank Meyerton, and that her brother is diseased. I would appreciate it if this could be resolved immediately, my daughter's name is Debby and her contact number is ***