inefficiencies from departments within Cell C

Cell C is billing me for contracts that i don't have with them, in June i received 4 contract sim cards including an OPPO phone with its sim card. Initially i though one of the sim card was to replace the one Cell C lost when i took my phone for repairs. I called their call center to enquire, the response was that they were send by error and they will get a courier services to come collect, i called again the following Monday to check how far is the courier services, the courier services came the Wednesday of that week and collected all the items, I made sure to call Cell C to follow up and see if the stuff was returned back, the contract dep consultant told me that i will get a call confirming that the items were returned successfully. I called again after week and only to realize through their verification process that those sim cards and the phone are in my name as added contracts, this came about as i was constantly failing the verification questions. That is when i wrote a review with HELLO PETER, i ended up paying for sim swap where i was promised that i won't pay, i requested to talk to the team leader and was told she will call me, even now i am still waiting. on Saturday i went to the cellc branch in Alberton City , to my surprise , the deductions on my account were for the contracts i don't have. To make matters worse, i am paying for almost a year for the I'm card i never received from cell c ***, even the consultant who was helping me confirmed that the sim card is not activated and its almost a year now i have been paying for airtime i have never used.