Why do I keep getting charged monthly $2.99?

The following links should help you to both identify and manage any recurring Apple service subscriptions associated with your AppleID account:

If you want to cancel a subscription from Apple - Apple Support

Manage App Store purchases, subscriptions, settings, and restrictions on iPad - Apple Support

Subscriptions and Billing - Official Apple Support

View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support

There is no one from Apple here to address your billing concerns.

We are all, largely, just Apple product users here, just like you!

How would we know?

Do you pay for monthly Apple iCloud offsite data storage?

Did you subscribe to an app the takes out funds monthly?

You can check your iCloud monthly subscription plan by going into the Settings app, tap your large name/Apple ID panel and tap iCloud to see what monthly amount of offsite storage you pay for every single month.

For subscriptions to apps, go to the App Store app, tap the upper right hand corner ballon with your Initial or memoji icon, then in the pop-up that appears, tap subscriptions.

Best of Luck to You!