Unable to cancel free trial

I was never able to cancel my free trial.  Every day of the free trial I would get the above error and recommendation that I "try again" later.  I suspect this "bug" is an intentional strategy on the part of Adobe to prevent cancelation before the end of the free trial.  In fact when you search the help pages there appears to be a reference to this "bug" because it says on the help page itself if you can't cancel go ahead "try again later".  So I take this as Adobe is aware enough of this bug that they can document it in their help pages but are not willing to fix the "bug".  Why would that be?  Presumably, of course, because this "bug" generates revenue.  The only way I could stop them from charging me at the end of the uncancelable free trial was to cancel my credit card ahead of the end of the free trial (I have and highly recommend the Privacy app for disposable credit card numbers).  Amusingly, Adobe still won't take the hint that I don't want the service.  It lists the account as having a "billing issue" (which is fine) but when I go to manage account to try again to cancel the subscription it says it can't let me cancel without first giving a new credit card.  Very frustrating experience.  If someone from Adobe is listening I'd appreciate some help on this.  I want to keep Adobe Express but these other things I trialed were unusable to me.  Which is exactly why you want to do free trials.