I have a $6.99 charge that Im unaware of

Look at the purchase histories of all iTunes accounts linked to the card : See your purchase history in the App Store or iTunes Store - Apple Support

If you can't find it could it be : About payment card authorisation holds in the iTunes Store - Apple Support ?

If not, contact the card issuer

This issue might from an app subscription. Even if an app have been deleted, app subscription can be still ongoing and you will be charge of amount.

You can verify it from your account settings in device or also from website reportaproblem.apple.com.

Try checking app subscriptions, most of the apps probably have a subscription ongoing that you are unaware of.

I have had charges of $8.47 and $15.89 on my bank debit card every month since November. I have no iTunes apps or subscriptions on my iTunes account. There is a phone number alongside the charge. I googled the number and it turns out it is a scam. Needless to say, I will be going to my bank in the morning. Probably have to get a different card again!! I am sorry this has happened to you also.