What is the $2.99 fee I am recently being charged?
Why am I being charged $2.99/month lately
iPhone 6, iOS 12
Go to this one-stop-site for billing questions→Subscriptions and Billing - Official Apple Support and click to view your purchase history. From the same page you can cancel a subscription (which is what it probably is), and, if it was subscribed in error, you can request a refund.