Supersonic worst experience

In August I signed up with Supersonic for their 30G Data plan, then after a week I received my router and sim card but the router wasn't working, it had no network. I've called them a million times trying to fix this with no luck to any solution. Then after a month I wanted to cancel my contract and get my refund and was told to send an email to the cancellations department in which I did, after two weeks I got a call from one of their consultants and he said he couldn't located my profile on their database then said he will call me back from there I've never received any communication from them. It has been months sending emails requesting to cancel but they never get back to me. SAVE YOUR SELF THE HEADACHE AND NEVER SIGNUP WITH SUPERSONIC