Hide the Payment Page when the user already subscribed


I’m trying to disable the payment page on a multi-page form when the user has already subscribed to a product.

I only have 2 pages on the form - The Begin form is (Review form) and End Form (Payment wall).

Once the user is subscribed or filled out the payment page, the next time he will fill out the form would be page 1 only (Review form) and disable the payment page.

Any help would be much appreciated. Thank you