This domain is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details

This is the error i keep getting when trying to use my Zoho Domain Mail.

This domain is not allowed to add in Zoho. Please contact support-as@zohocorp.com for further details

Find attached.

I hope this can be resolved very quickly so i can go on and make this registration before tomorrow Monday.