I’m being charged for premium channels

I’ve been a directv customer off and on for years. They are my current TV provider since 2019. In March of 2022 I agreed to a 3 months fee promo of starz Cinemax and showtime. The promo ended in may so I called a week or so before the end date and canceled. Everything seemed fine until I got my bill. I was being charged $36 and change for starz Cinemax and HBO max. I called immediately and told them I had canceled the promotion prior to the due date and that I don’t have access to starz and Cinemax(I kept HBO max) but I am still being charged. The representative assured me that the channels had been canceled and that I would no longer be billed for this. Well the next bill rolls around and there is the $36 and change charge for starz Cinemax and HBO max. So I called them back. They credited the $36 back to my account and swore that it was canceled AGAIN. Well the next bill comes in and there is the same $36 and change charge. Call back and get the same spill how they are canceling the premium channels and I wouldn’t have to worry anymore. Mind you, I don’t have access to these Channels at all. When I go to starz or Cinemax it shows me the steps to subscribe. It is now almost February 2023 and every single month I have still been charged for these premium channels. One lady in billing flat acted like I was lying to them about having access to the channels and acted like I was somehow at fault for the cancellations not going thru. Basically like I was trying to scam Directv to get credits on my bill or something. I’ve filed a complaint with directv but nothing had changed and I don’t feel like it will. What is my recourse?? Can I just cancel my service with them. Who can I talk to about this. Someone that can actually help me. It’s literally caused me severe anxiety having to call these people every month and re-explain all this mess.