MTN deceased legal department

My father passed away and trying to cancel his contract has been a nightmare with MTN. Bluff branch scanned all relevant documents to deceased dept. Told to follow up. For over a month I haven't been able to speak to anyone to follow up. Get passed from one person to the next, one number to the next. On hold forever just to constantly be cut off. Having to explain my situation again and again. No one seems to know who to speak to. No one in Legal department can help and profile doesn't exist but have a letterhead with their reference. It is emotional enough having to close his account then having to deal with this.