Why is it so hard to cancel?

I signed up for a free trial a few days ago by accident, my computer was lagging. As I hoovered over the offer constantly moving and clicking trying to get my sensor to connect it clicked on the offer and went through the prompts, all my information was already there due to me having an account before. I was in the account trying to fill out a document, but I didn't have plans to sign up for Adobe again, I had it before and it didn't work out for me. I tried to cancel, it gave me a your subscription will end on June 5th message so I logged out thinking everything was ok. But after a few days went by I went to check my email for a cancellation email, nothing, but I did get an email today saying payment declined. And I'm glad it did! Because it shouldn't still be active! Please cancel