Can’t cancel free trial

I had a 7-day free trial of Photoshop in my personal Adobe account, and am being given the option to extend it another week or cancel it. When I try to do either, be it in my laptop or phone web browsers, I get an error message that pops up in red and says, “an error occurred. Please try again”. So now I’m going to be charged for a year of Adobe against my will because it won’t let me cancel. I would’ve liked another week on my trial but it gives the same error for that too. 
 

I’ve tried using a different browser, incognito mode, clearing cache, and nothing works. I’ve been asking and trying all day and I don’t want to be charged