Bad customer service

Good day

I have major problems cancelling my contract with vodacom. In 2018 I upgraded my contract and got 2 phones for 1 price and 1 contract. My contract was due to expire at the end of August 2020 so I started my cancellation in July already as the requirement. I have the vodacom app so during August I saw I had a bill for end September which was due so I contacted them again and was told everything is in order , the bill reflecting on the app is wrong. Come September 1rst I received airtime and contacted them again and was told an error occurred. I then paid the fee and was told it was sorted. I then received bills for my cancelled contract since and sent emails with no reply. I decided I`m not paying this account as this is not my issue. The twist now is that my credit score has plummeted due to this nonsense. If vodacom sees this I wanna tell you something, " I`ve been a customer of yours since I started having a paid job, I vowed by your network stability and reliability. At times I had 4 contracts with you and was very happy. Problems only occur when I want to cancel and this took me away from your services, your consultants lies in my face and customer service became horrible. I could`ve cursed or used profanity in this review but I wont, You will not understand the rage and anger I have against vodacom" .