Bad experience with OnAir TV

On the 30th of October 2025, I received a call from OnAir TV, the lady who gave me a call told me their calls are recorded for quality purpose. She offered a new decoder for DSTV Stream which doesn't need a dish to be connected. She told me the decoder has internet installed already inside which I have to pay only R189.00 every month. I explained to her my TV is not a Smart TV because I google this device it only work on Smart TV, Laptop, Tablet or Smart Phone, she told me when I connect this device to my TV it will automatically change my TV to Smart TV which she **** about it. I gave her all my details and she told me when they deliver they will contact me which they didn't. The next day on Friday the 31st a courier guy contacted me saying he's at my gate. I told him I'm at work, he asked my work address which I gave it to him and he delivered the package at work. When I get home I connected the device to my TV but was never connected as I was told. The TV screen keeps on saying no signal. I unplugged the device and put it back to the box, I contacted OnAir TV via email explained the situation I am experiencing and told them to cancel this contract and come and collect the device. They told me I must pay a fee of R200 if the box is still seelled if is open I must pay R400, if they don't receive the money they don't collect and I will still be responsible for paying contract. I told them I am not paying for something I don't use, it is their fault for lying to me by saying the device will change my screen automatically which never happened. To me I feel like this contract was given to me by fost, I didn't sign anything with them.