MTN useless service

I sent MTN customer services an e-mail on 6 October to cancel a contract. On the same date they rep**** that my request has been escalated to their retentions department and provided an e-mail address for this department if I wanted to follow up on progress ir alternatively to call 083135 and choose option 4. This option does not even exist if you call from a non-MTN number. My cell is not a MTN phone and the number that I wanted to cancel is not a phone device. Why must I follow up - why don’t they do their jobs and call me? As I never heard from these retensions people I sent them 2 e-mails on 15 October and 21 October to which I have still not had a reply. I e-mailes customer services again on 26 October and they confirmed that the contract was still active 20 days after my request and in the mean time I have to carry on paying! What a cheap filthy mean way for this company to balance its books after the COVID losses. Customer services said that they again escalated the matter to their retensions department. I don’t want to be retained by this useless monopoly I just want my contract cancelled! I can write books about the terrible and inefficient service of this company and many of their options when you phone 135/083135 do not work. Stay away from this monopoly!!!!!