How to cancel Amazon Music purchased through Apple

Hello and thanks. The problem is, I follow those steps but I do not have a CANCEL button. It only allows me to pay for the next month. I have Amazon Music PAID thru Apple. I tried to cancel with Amazon and even did a chat with them, but they said I should do it thru Apple, and I can’t.

Thank you AKRBTN, yes, I see an expiration date that is coming up, and not a next billing date. I appreciate it.