Dstv internet

I ordered the dstv wifi router And they delivered it I call the call center to activate the router and it was working after an hour and I used it nicely for 2 days after 2 days when I switch it on it had a green light I call the call center to report that we can't connect on the wifi and they couldn't help us for 3 days so I said if they can't help me they must cancel it because I can't pay for something that I don't use so they cancelled for me now they charge me R180 for canceling fee and they say I must pay R1100 as well but they never told me those stories the time they wanted me to join they said I can cancel any time I want to. Dstv is a **** they are eating our money and this was not even my fault its their fault because I still wanted to use the wifi but they can't help to fix the errors