Refusing to close my telkom contract even thou it's paid up

This month I had paid up my telkom contract account and called them to get it closed different agents I spoke to but still could not assist me I really need to close this account before they Debit me for something am not using anymore they telling me it the number and contract will get canceled automatically at the end of the month which is bull**** lies they want to keep debiting me after struggling to pay that account I'll nva recommend anyone to use telkom they even refused to give me a paid up letter I will not be held liable for paying an account that I keep begging them to close even thou they don't Want to am sick and tired of this with their *********** call centre agents who don't know what they are doing this is ruining my life and credit score I just want this account closed before the end of this month it's making me sick am tired