OnAir incompetence

I have never dealt with such in competence in my life. I was phoned and asked if I wanted a new decoder. Mine is very old so I said yes. When it was delivered it was a streaming decoder for which I have no use. (I was not told). After 32 emails back and forth I cancelled the contract within the time allowed and returned the decoder which cost me R400. I am still getting texts to say my subscription is due on 28/08/2025. I now have to make sure that I don't have R189 in my account which is very frustrating. How you are still in business is beyond me.