Our static IP is vital, it's loaded into the firewalls of all our servers, and without it we were really stuffed - probably the worse thing to happen to us, short of losing all internet connectivity.
Spoke to faults, and after an hour of frustration, turned to @telecomnz on Twitter.
Tony Dale (TD) on their account addressed our issues and worked tirelessly to get us back up and going. Our static IP had been reallocated to another customer, so he liaised with them to sort them out, then restored our IP back to us - even offered to keep working on his days off to get us sorted.
His service during this whole experience has been exceptional - without his help we were facing weeks and weeks of outages, reconfiguration and cost.
Thank-you Tony (and Telecom) - you've been brilliant.