From the new page, select Manage Prime Membership from the bottom of the screen. Tap End Trial and Benefits to locate it. When prompted, choose Stop My Benefits and Continue to Cancel or Cancel Membership.
Why can’t I stop Prime before my membership expires? Because it’s a 30-day trial, you may cancel it early and not be charged. The program will cancel your trial at the end of that month, and there will be nothing else to worry about.