After an unsuccessful attempt to pay Business plan, an error popped up, then the ability to select the type of account and VAT number disappeared. Then we did not try to add anew the card again, because we want the VAT number to be completed.
Can you create a Billing ticket and share your ticket number here? You can open a Billing ticket here, https://dash.cloudflare.com/?to=/:account/support. Select Billing and work the form top to bottom and at the bottom, indicate you need to open a ticket.
Thank you for creating and sharing your ticket number 01064462. The ticket has been escalated to our Billing team for further investigation. They will respond to you as soon as possible. Your patience is highly appreciated.