Cloudflare is not sending the activation email, and it's not updating the DNS

It’s been 3 days since I’ve been trying to attach my website to Cloudflare to update the DNS. However, for the past 3 days, it’s been continuously showing API failed errors, either with 503 or 504 errors, or it just keeps loading. I still haven’t received the account verification email. What could be the problem? When will this be resolved? It’s delaying work, and clients are getting disappointed. Cloudflare hasn’t resolved the issue for 3 days.