Refusal to Cancel Upgrade

Had "feedback" from Cell C today. On 27 December got an upgrade at Kalahari Mall in Upington for 2 LG Handsets (Cell Phones). I returned these handsets on 28 December, but still Cell C refuses to cancel the upgrade which is my right.

I do not want them to fix the handsets and send them back to me (wi fi not working), as I have no confidence in the manufacturer due to both handsets not working. This would most likely result in a back and forth sending of the products which I do not want - I therefore stated plainly that I do not want the products anymore. (Most likely the products would be returned to me and not work or would again stop working after just a short while)

Still no customer service just a representative telling me I am wrong and must accept the upgrade I wish to cancel (Got a phone call today while in Namibia). I will not be bul**** by Cell C in to taking an upgrade I do not want. As a customer it is my right to hand the product back, which I have done.

I had no issues with my previous Huawei two phones I upgraded to in April 2016 (Still working today). Maybe just don't sell LG Products.

Due to Cell C's arrogance I want my contract to stop in April 2018. I will change to pay as you go. After 15 years you have lost me as a contract customer.