Tech Support does NOT regularly monitor this forum. You need to open a support ticket with them.
Was this domain brand new, or was it working before? If it is new, was it just created? It takes up to 72 hours for the domain name (or any changes to it) to be propagated around the world on the DNS system. If this was an existing domain that was working for some time, check with the domain registrar and see if it expired. Did you forget to renew it?