to null-routing a number of our IP addresses for no quantifiable reason during our recovery efforts, to completely ignoring their support SLA and keeping us waiting for days on end in some cases for simple status updates.

Sorry a bit off topic here,  but do we have the same company?    Our server was null-routed 2 times this week. and have been nagged for 2 weeks since we updated  all the servers..  All of our servers were null-routed.

(again, sorry for the off-topic),  I do have a post about it though.