Please tell me how to turn off auto billing! I keep getting charged 4.99 per month for an app iTunes bill that doesn’t show up on my account- please help!

Various possibilities:

If you see ‘itunes.com/bill‘ or an unfamiliar charge on your bank, credit card, or debit statement - Does not mention purchases made under Family Sharing which might be charged to the organizer's card but will not appear under the organizer's purchase history or subscriptions. Ask family members about those or check your receipts. --> https://support.apple.com/HT207865

View, change, or cancel your subscriptions - "Learn how to view your subscriptions that renew automatically, change your subscription period, and turn off Automatic Renewal." "If you don’t cancel more than 24 hours before your renewal date, your subscription might renew." Deleting an app does not cancel a subscription. https://support.apple.com/HT202039

Get help with subscriptions not billed through Apple - https://support.apple.com/HT207865

Can I get help with this app what I don’t have my phone but it’s charging me

It is best to start your own topic since this one is over a month old. Anyway, the responses I posted back then would apply in your case. Deleting an app does not cancel a subscription.