At this point @jgrahamc has the worst of it - people show up here time after time hoping they can make enough of a stink to get him involved.
more importantly, its important to send a message. We depend on these services for our livelihood. if I'm paying for a service, the least I'm owed is the ability to get in touch with a person to rectify the situation as soon as possible. Companies who want other companies relaying on their service need to provide that if they want to be taken seriously.
EDIT: also, not to knock jgrahamc. appreciate that you're looking into this but one person on an email is not a scalable customer service solution for B2B. at the very minimum, there should be some sort of platform for filing the tickets, getting a timeframe on resolution as well as options to pay for faster turnaround.