Check out miningsweden.se. They are one of the few cloud mining services that has shown proof that they are actually mining. Support is very quck, and the site is simple to use.
Can you link us the proof of actual mining? I can't seam to find it, and their site looks rather bad.
Fast support could just mean that they are luring customers in by pretending to have good service. I could be wrong, but lately i'm very sceptical regarding "ponzi mining" companies.
cheers