It's to naïve to pay something first without knowing if they are LEGIT one. Maybe that is why nothing happened after you have paid them because they are just one of those HYIPs out there or just a SCAM site which are collecting bitcoins even though they will not really return it in time.

And cloudmining is not really good idea at all, because there are lots of Ponzi scam sites like this, saying that they would mine the bitcoin for you and going to earn bitcoin in time, but the truth is, they will not.