Roku paid subscriptions

I had turned on my Roku streaming device and clicked on an option to play jeopardy. I saw nothing to suggest I was going to be charged until after I was charged. I immediately cancelled but now I am told that there are no refunds. I would not have signed up if I had known I would be charged. It really seems awfully shady to me. I really had not had that experience with Roku before. Be careful what you click on. Roku has no avenues to contact anyone but a bot. I am disappointed. I think I should have been able to get my money back.