I am trying to cancel some subscriptures and not having any luck. What do I do?

See instructions in See instructions in If you want to cancel a subscription from Apple - Apple Support

Also see the following from If you want to cancel a subscription from Apple - Apple Support

You might need to scroll down to find the Cancel Subscription button. If there is no Cancel button or you see an expiration message in red text, the subscription is already canceled.

Also, a subscription that is already cancelled will typically have wording in fine print similar to "Expires on [date]" rather than "Renews on [date].”

If the above doesn't help, please reply with more detail about "not having any luck."