Phones collected but being billed for them

I was called by a guy who offered me a cellphone package of which I declined and told him I already had 2 cellphone contracts with Vodacom. He then added that actually one of the contracts was expiring in that month of June, so I can actually afford to take another contract (implying that it will now be an upgrade). ********ly I agreed, and we continued with the process. Later when I got home, I checked exactly when my contracts were expiring. I found that it was not true 1 of my contracts are expiring, then the following day I called Vodacom and I told them I did not want the phones( because I thought I was called by a Vodacom employee). They the told me they will schedule with the courier in my area to come collect. Indeed, the next Monday, the phones were collected. Then I have noticed that Vodacom was charging me too much money, I called them and they mentioned all the contracts I know I have with Vodacom, including the two phones I had sent back and requested the contract to be cancelled. Then the lady highlighted to me that the contract was actually issued by Afrizon and that I need to call Afrizon to cancel the contract so that it won't reflect on their system as active. I have sent an email to Afrizon a month, but there has not been any response from them ever since. When I call the landline, a lady answered eventually answered after many attempts of calling without the phone being answered. I explained the situation to the lady and she said she will forward the matter to the relevant department and they will get back to me after 7 days-it has been a month already and no feedback has been received from them I have been a loyal customer for Vodacom for more than 10 years and am considering not renewing my contracts when they expire because of this experience. If Vodacom is innocent in all this, why is it that their system indicates for the phones to be picked up as a result of contract cancellation but still they continue to bill me for them. I fail to understand why would Vodacom continue to want be associated with such a company like Afrizon. Please, can someone help resolve this matter as this is affecting my credit report status.