Sell Direct and Telkom forcefully creating a contract without consent

This is my second posting since Telkom decided not to attend to my grievances. I had my data contract upgrade by Sell Direct in Sept 2017 when they phoned me. the unit and simcard was delivered but couldn't connect for about 4wks + to which Sell Direct said I owed Telkom that's why I couldn't connect. I didn't owe Telkom anything so after being sent back and forth by Sell Direct and cutting off my calls whenever I enquired I went to the Telkom shop and they upgraded me without any problems as the system showed that I was up to date with my ac****. I tried to return the Selldirect unit to which the consultant said that it was after the 7 days so I musnt. only now in May did I see that Selldirect allocated me a new mobile data number and being billed for an account I didn't authorize. Been waiting for Telkom to help more than a 10 days to no avail as to who authorized that new contract without my consent as it was Sell direct problem who sold me an upgrade that they couldn't fullfil. I have a complaint log number that nobody from Telkom accounts has reverted back to me in the 72 hours they stipulated. can someone help me as this is **************** when people aren't doing their work just to inconvenience me the customer.