Sports unavailable on TV

I previously signed up for Showmax Pro to watch sport. Yesterday I signed up again so I can enjoy the Olympics on my TV only to find out that I am unable to do so. I can only watch sport on my mobile. I immediately cancelled the subscription and demanded a refund as you have changed your plans. I was denied a refund which I find unacceptable as I have not even used the service. This is ******* and should be reported. Furthermore when I was trying it on my TV the picture quality was so poor then when I tried to exit the app I couldn't. Overall *** quality and bad service. I want my money back.