Well, the first place to start is with Support, they can issue an escalation if it is warranted.
There is not a direct email address I can refer you to, so check support.godaddy.com for your closest contact phone number or chat. You can also check for infrequent systemic issues here: http://status.godaddy.com/
I hope that helps,
Thomas D. - GoDaddy | Community Moderator 24/7 support available at x.co/247support