Family Sharing Payment not updating for family members

Hey there, and welcome to Apple Support Communities lisa-marie67,

We can certainly understand your concern and can help provide some insight.

We recommend checking out these steps on how to manage your payment methods and see if everything matches up on your side.

" How to change your payment method on your iPhone, iPad, or iPod touch

1. Open the Settings app.
2. Tap your name.
3. Tap Payment & Shipping. You might be asked to sign in with your Apple ID.
4. From here, you can do these things:

Add a payment method — Tap Add Payment Method.

• Update a payment method — Tap the payment method, then edit your information. You might need to enter the security code that's printed on your credit or debit card. If you use the card with Apple Pay, go to the Wallet app to edit the card information.
• Remove a payment method — Tap Edit, tap the red Delete button, then tap Remove. If you have an unpaid balance, have subscriptions including an iCloud storage plan, or you use purchase sharing, you can't remove all payment methods. Learn how to remove all payment methods.
• Change the order of your payment methods — Tap Edit, then drag the move order icon .* "

For additional information, check out this link: Change, add, or remove Apple ID payment methods - Apple Support

Kindest regards!

I have a similar problem where I left my family plan because it was forcing me to use my families payment plan instead of letting me use my own card. I tried leaving the plan but it is still trying to get me to use my families payment plan even though I am no longer in the plan.