This is a sticky situation to be in. I mean if they don't respond to your support tickets then there is really no other way of communicating with them. Even though i would consider hash flare a very dodgy business anyways, are you sure that your bitcoin transaction was sent to the right address?

Because this is one of a kind sort of complaint. Every single complaint against them is about the payouts/degradation of contract, but none of the complaints i've heard up to this point is about the buying of contract not working.

Hopefully you sort this out, but even if you do i have to let you know that there is very little in investing in cloud mining.