Poorer than Poor service

As from 6 August 2019, I am trying to cancel the mobile contract of a deceased client's account. I received a Case no:***9 as confirmation of my request and yet to this day we still receive invoices for this account. After numerous attempt to enquire about this account via email to ,***, *** visiting Paarl Mall Branch whom claim they do not work with such cases and referred me back to the call centre that does not talk to anyone other than the account holder even if he/she is deceased according to Hlengiwe Dlamini and 3 other call centre agents who just hang up on me while I am talking to them. Is this really how Telkom make business?