MTN'S LACK OF REFUND AND RESPONSE TO EMAILS

On 12 June 2018 a request for cancellation of a contract was sent through after the owner of the contract passed away. The cancellation was confirmed by Siyabonga Ngwenya under case number: # ********** 5. However, MTN proceeded to debit two more debit orders. A request to refund the Estate was sent on 11 October 2018. MTN then rep**** saying they have a claim against the Estate in the amount of R588,22. After advising them that the contract was already cancelled in June they came back saying they will write the balance off. THIS IS ALREADY RIDICULOUS AS THEY OWE THE ESTATE MONEY, NOT THE OTHER WAY AROUND.... 6 November 2018 Nomvula Zwane asked for the Estate Late bank details in order for them to refund the Estate (admitting they owed the Estate) Ref: ********** 6. On 14 November 2018 they confirmed that the refund was processed. Reference number: 1- ********** 2423. Since November 2018 we have followed up on numerous occasions without any reply. We are not getting any refund, any reply - NOTHING!? I cannot phone them to follow up, they are ignoring all emails, social media queries. How am I going to get the refund?