I will try to change that and delete/readd my website to check that I’ll be able to change ns records during readding site, but unfortunately cant
The worst is that I don’t have access to my domain provider, because it sending e-mail with pass code to my e-mail in the same domain but everything is down. Now I can’t change manually my ns records on hosting side.
I will try to revert to:
What feature, service or problem is this related to?
Did you change your nameservers before it was time to change them? If existing Cloudflare nameservers are discovered while adding a domain, a different pair will be assigned. Removing and adding the domain will never result in the existing pair being restored.
You are going to need to contact your registrar to regain access to your account there in order to update your nameservers. I’m not fond of email-based MFA for the situation you find yourself in, among its other shortcomings. Once you regain access, you might want to see if your registrar has an option to generate backup codes that you can store in your password safe for such emergencies.
