Sling TV Bills endless- no refunds, no courtesy. Internet

Wanted to do a free trial of Sling TV.  After getting my credit card info and an email address, they started the trial.  After getting my credit card they tell me I need specific equipment for my television to access their service- i would have to buy it.  I tell them no thanks, I don't want to buy equipment for a free trial.  The rep on the phone walks me through activitating their service via an app on my cell phone.  Okay, it works, but I'm not looking to watch TV on my phone I tell them.  This isn't going to work for me, but thank you. 

They continue to bill my credit card, my bad for not catching it earlier, for 6 months.  When I do notice, i call and explain.  They said that their policy for the free trial clearly states that as long as I connected once I become a member and they absolutely will not offer refunds - they would not even as a courtesy refund the $39.99 they had charges me just 4 days ago but said I'll continue to get serivice for the next month.  I reiterated that I don't even have the equipment.  I asked to speak to a supervisor and they said" they are going to tell you exactly what I told you, that once you connected we do not offer refunds"  

The original sales rep basically duped me into signing in on my phone to lock me in, even though I told him on the phone that I didn't want the service at all before I hung up!