How to Cancel Subscription and Get a Refund!

I live in the USA and used my bank Visa card while watching a movie link connected to Sweetmax on Facebook in early September. I did not finish the movie and did not knowingly approve any ongoing subscription. Despite this, Sweetmax has been charging me $25.00 every week, and the total amount taken has now exceeded $100.00. I tried to cancel any possible subscription, but I could not find any option to cancel on their page, and there is no visible customer service phone number or email address to reach them. Because of this, I am stuck with repeated charges that I never clearly agreed to and cannot stop directly with the company. I request that all unauthorized weekly charges from Sweetmax be fully refunded and that any existing subscription or recurring payment linked to my card be cancelled immediately so that no further money is taken from my account without my clear consent.