Pathetic service!

I am absolutely angry right now. I received a sms from telkom stating that my account is in arrears of R6679. 16. I went the telkom branch in Chatsworth centre and I was told that my account is actually in arrears and I could get BLACKLISTED. I app**** for the telkom adsl service in August 2019. By end of 2019 when no1 contacted me regarding installation, I went to the Chatsworth telkom branch to cancel this contract. According to the manager on duty. It was cancelled! After that open serve came to my house and installed a phone line. According to them no one told them the contract was cancelled. So they installed the line only. I later called the call centre and asked them if they could activate the contract as open serve installed a line already. And I don't mind now activating the contract. I was told that they don't know why open serve installed the line as it is reflecting on the system that the contract is cancelled but she will make note that the line was installed. And if I want to activate the account I will have to go back to the Chatsworth branch and ask them to activate it as the line is already installed. I assumed open serve will come back to my house to remove the line, but they did not. When I went back to the store. I was told that I would need to re apply for the contract and re submit all documents. I thereafter REFUSED. NOW! I receive an sms stating my account is in arrears. How is that even possible when I never ever used that line and I'm sure you would be able to pick up on ur system if I made any calls. I also never used wifi. I have been buying data on my phone. I was also told that adsl line will not work in my area even though they installed it. My account was never ever activated, Im sure you will be able to pick that up on ur system. How do you charge someone for that? Your manager at the telkom branch in Chatsworth told me that the account was cancelled. His attitude stinks and I remember that very clearly as he will definitely remember me cancelling my account. Who now pays for my Petrol to your branch, who now pays for all the data I lost trying to contact an agent. Who now pays for all my Airtime wasted trying to phone and get some help from your useless call centre. If I do not get feedback by Monday and if this is not investigated and my account is not closed and all the money owing is not cleared. I am going to the ombudsman as this is a violation of the consumer act.