Haven't been using Adobe for years, but Have been billed every month for ~3 years now. What do I do?

Hello all! I am at the current moment very frustrated. Back in 2017, I needed Adobe for a project so I subscribed for maybe 2 months in total, got the work done and had no need for Adobe at all afterwards so I cancelled and was told that my subscription would be terminated the upcoming month. With that being said, I had lots of peace of mind. Call me an idiot (mainly because I feel like one), but low and behold my subscription WASNT cancelled and I have been getting billed every month ... since 2017!! Being a college student scraping by with every penny I get, this is very frustrating to me, especially because I havent been using Adobe since i thought my subscription was cancelled, hell I dont even have any adobe products installed on any of my devices. Some how I havent really noticed the billings until recent, when I saw my last months bill get put through thinking "Hmmm I thought I cancelled that years ago", just to find invoices dating back ~4 years. Thats almost $500 wasted! I have no idea what to do. I tried getting through to support but was ultimately unsucessful. Does anyone have any advice to offer (yes I know, check my bank statement LOL, got that one engragved in my head by now)