Denying me the right to cancel a subscription I was falsely sold.

I was sold the steamer under false information on 4/02/2025. The sales lady told me that the device can be substituted for my normal DSTV decoder and that my compact subscription will also be lowered to R399 I did however, tell the saleslady that I do not need the streamer because I have a smart TV, but I do not mind taking it if it will lower my compact subscription. She told me I just need to call multichoice upon receiving the device and set it up. When I called MultiChoice, I was informed that there is no such thing and that the streamer is only for people who do not have a smart TV. I then called OnAir multiple times to no avail because they never answer their calls. I then sent them an email explaining the situation and that I would like to cancel the subscription and would like for them to come collect their device. They refused to cancel the subscription, stating that I had passed the 7-day cooling off period. Even after explaining to them that I do not need it and that it was sold to me under false information, they are still refusing to cancel. Instead, they want me to pay, which I refuse because they are refusing to access the recordings of the call on 04/02/2025. Now they are threatening a negative listing on the credit bureau. This is not on because I have contacted them on multiple occasions on almost all communication platforms, requesting them to fix this problem, but they do not want to fix it. Instead, I am being threatened.