DNS not accessible from some network

I have a domain setup on cloudflare that is suddenly accessible only via some networks in Nigeria. This started about 7 am UTC. This also affected our MX as we can’t even receive the access code sent by cloudflare when challenged during logging in. I had to resort to my personal account to be able to send this to the community. Can anyone help in resolving or at most contact CF if they can attend to this?

What is the domain?

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