Telkom sim card Cancellation while continue to rob me my money

My name is mandisa Makhubela, I had a sim card contract with telkom from January 2020 for 2years, I was paying 299 which was giving me 40gig for a day and 40gig for night, then before my contract end I received a call around December offered to upgrade same gigs with less amount which was for 199, I agreed to continue with it, first month they deducted more money , second month more money, when I called the agent was not even helpful, I told her I have a taken up a new contract n I was supposed to pay 199 but telkom is deducting more , she said maybe I subscribed for things , I said how as I have a simcard in a router, I request her to check n cancel what ever that is being subscribed, she said she can't help I have to do that, so I told her cancel the contract n tell me how much I should pay for Cancellation, she did her calculations n came back and said because you renewed the contract with us , no need to pay anything. I will cancel it for you, we will send you a reference as proof of Cancellation as I requested a letter and she said I will send you a reference number: ***. Then end of the month received a bill called in spoke to another lady who confirmed that it was last payment my contract was canceled, I told her I was told that I don't owe anything, but I said please make sure it's really canceled this time...to my surprise 2 months receiving accounts I don't even use it, as I don't receive data, but I am still billed now am told I owe 578, can they clarify for what? Again they already deducted my account which I was supposed to get that money back but still they messing up my credit records. I am sk angry 😠 😡 👿 I need this contract to be canceled correctly, give me what you took from my account back to me and update my credit records and send me a letter to confirm cancelation and an update to my credit record. My cancellation was on the 29March2022. The sim number is ***.