After sales customer services Call centre

I have phoned the after sales customer services on the 29 of January 2018 and spoke to Nomcebo Mthethwa. As she could not help me, I asked for her supervisor. She put my call through to Thembinkosi Ndlovu. He is the team leader. On explaining my problem that a contract was sold to me, and that the person making the sale, **** to me, and asking that I would like to cancel the new contract, Thembinkosi handled my call by being unhelpfull and aggresive toward me. He did make the arrangements for Ram couriers to collect the devise that I could return it and only after that can I cancel the contract. He did not take my contact telephone number and now more than 11 days later the device has not been fetched. I am still unable to cancel my contract. I phoned again on the 6 Feb. 2018, and spoke to Nomcebo Mthethwa and she was very helpful and explained to me that I was phoned but they phoned a number on my contract, that clearly can be seen only has data and that it is not used for any calls. There is a second number on my account that my son uses and it can clearly show that this number gets used regular. As mentioned Thembinkosi did not even ask me what number I use so the right details was not given to Ram couriers. Up to now I have had no joy and although Nomcebo has been very helpful, patient and explained everything nicely to me, her team leader Thembinkosi was rude, aggresive and unhelpful.