AccuBurst.com review: Offline 12 hrs a day!

I was wondering how I can put a complain for a service that i have paid in full and do not get what i have paid for. I run a couple of web pages with accuburst.com and my pages are usualy offline 12 hrs a day.
Recently the pages have been inactive for about 4 days. I keep emailing the server continualy but they never reply.

Regards
Chris