Billed for nonsense

I app**** for a SIM only package and it was delivered but it was not working. According to their website that place have coverage hence I app**** for the service but to my surprise the sim was not working. I used different routers hoping that the sim will work, even borrowed one of the routers they claimed to be compatible but there was no luck. Called their support line it also couldn't help, so I suggested that they add a router on my package but I was told it was impossible. I then was told if I cancel within the first 7 days I won't be charged as their sim was not working so I did cancel but now I'm told that I owe a cancellation fee. What frustrates me more is that we can't work as our emails are not active because of the suspended account and it's almost a month now and we paid for it. I'm left with no choice but to move our business as the matter hasn't been resolved after sending emails and calling trying to get help. Really disappointed and we won't refer other people.