Registration failed, can't update whois data

The domain is at my Cloudflare account, but it seems the registration failed even though I received the Paypal email “You have authorized a payment to Cloudflare” for the payment.

The whois data is empty and I can’t add my contact data.

On the section Registrar → Manage domain, there is a red icon with “Registration failed”, and clicking Manage shows “You have unverified Contacts” with no option to update it.

I submitted a ticket and was asked to provide screenshots, which I did 6 minutes later, and now it’s been over 24 hours with no further reply, ticket id 2447358