I already replied to you by email this morning. It looks like you also have problems with your email? This is something on your side regarding nameservers, see a copy of my response:
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I had to look into this, and it seems this domain's nameservers no longer point to Cloudflare.
https://dnschecker.org/ns-lookup.php?qu ... dns=google
Please check the nameserver settings from where you have the domain hosted.
The website is still on our servers, but I have no longer have this website in our Cloudflare account ... Either it was automatically removed after nameservers were changed, or you managed it yourself (I can't remember). In either case, nameservers are definitely wrong, and the nameserves are assigned on your side.
I would need to re-setup the domain in Cloudflare on our side, but first you need to check what you have in your nameserver settings and perhaps why it was changed.