Domain transferred to cloudflare successfully and now how to change name server to cloudflare?

i have moved my domain to Cloudflare but it is still showing to update nameserver.

as per my email…

The name servers for no longer point to Cloudflare. They now point to:
[not set]
[not set]
[not set]

This change means that is no longer using Cloudflare and will not receive the benefits of our security and performance services. Your DNS records will be completely removed from our system in 7 days.

If the name server change was in error, reactivate your domain by pointing your nameservers back to:

help me out to solve this problem.

you should open a support ticket (click Get Additional help) and describe the issue. This sometimes happens with the old registrar changing the nameservers before the transfer.

Raising the ticket helped me. Cloudflare support helped me and solved my problem in just 1 day.

Thank you so much