need to cancel subscription dated 2/27 for $39.99.

This is primarily a user-to-user support forum; other Apple users like you. We cannot cancel anything. See instructions in How to cancel a subscription from Apple - Apple Support and Request a refund for apps or content that you bought from Apple - Apple Support

If that doesn't help, see each of the steps in the following instructions. They include information on contacting Apple Support if the other steps don't help: https://support.apple.com/en-us/HT201382

Go here→Subscriptions and Billing - Official Apple Support, tap on Subscriptions to cancel it. If you were charged you can then request a refund from the same link.

Read and follow the article linked above.

Of course, it’s too late to cancel any payments made before today. But your subscription will cancel at its next renewal date.