Cell C service is disgusting

I would like to make a complaint about the service provided by C cell C. My contract expired in July, so I contacted them in August to request that the network be deactivated and to report a misplaced sim card. By the end of August, I received an SMS with a monthly charge and the amount of data utilized for the previous month. I contacted Cell C again, seeking at the very least a sim block, and they agreed to look at it.

I have been receiving sms updates on how much data has been used on that Cell C simcard ***). The frustration stems from the fact that I reported a misplaced simcard as well as requested network disconnection. Now I have arrears on this account for something I don't even use. Even today When I contacted for help I did not get help, one of the Cell C representatives gave me a wrong contact number, claiming it was their head office number. When I dialed that number, it was a discovery line (***). As a result, I ended up composing this email since I was out of options. Please assist Kind regardsMr Singimba