Deceased Estate cannot be finalized as MBD not responding

My husband passed away in September 2020 and had a credit card with Standard bank which was sold to MBD attorneys. From the 5th of October 2020, MDB attorneys were notified about the death and was requested to sent a death certificate. The death certificate was sent to many MBD consultants, namely, R Bezuidenhout, Shirley Naidoo and Arthur Monchu. There was never an acknowledgement for the receipt of the documents. The attorneys handling the estate are struggling to get into contact with MBD attorneys. They do not respond to calls or email. The current account for my late husband held with Standard bank cannot be closed or frozen due to MBD not providing the attorneys with required information. The account is now in arrears due to monthly service fees that is being charged. Can MBD sort out their house. The estate needs to be finalized.

Frustrated