Sorry if you die with a cell c fibre contract - no one knows what to do!

I have been trying unsuccessfully for nearly two months to change the Cell C fibre contract from my deceased father's name into my mothers name. I cannot recall how many times I have called cell c fibre support. Nor can i count how many times my call has been cut off. I have been transferred to sales, to support, to business, to legal. No-one knows how to help. I have tried social media and twitter to get assistance. I have an email with a ticket number dated 26/01/2019 which says they will get back to me. I have been promised a return phonecall at specific times on specific days and they have never materialised. Nothing. It is impossible. Is this the first time in history that a person has died with a cell c fibre contract that is fixed at his home and needs to be transferred into someone else's name in order for payment to continue? This has been the worst experience. Every other company has managed without an issue. And what is worse - the individuals in the call centre couldnt care less. They are uninterested and cannot wait to fob you off on another extension or cut you off so they dont have to deal with the situation.