****ed off customer

I have logged call here last week where I was convinced to take a contract of ultra decoder after was told that it comes with built in wifi and only to regret after receiving it and there was no wifi but only decoder, I got a call from investigation officer who told me that I can't cancel the contract and the only option is to pay off the decoder. She insisted that I have received a communication and I was given the correct info by the consultant, which I still dispute and she also advised that she will send me the m****cript not voice recording as per my request which I still waiting for update even now. The call has been closed on this platform. I can tell that on air is just one of don't care business nor only focusing on their profit. My question now is why do they refuse with audio and want to give m****cripts while when they call to convince us they not talking it. Now I am forced/ trapped in their own mess. This company just want our money for free, as I was told that I can cancel the contract for free just after receiving the decoder and not happy but should I wish to cancel at later stage I will be paying R180.00 which now I am told that it's R500.00.