Unfortunately they don't telling me which coin they mining.Nor any information about any mining pools involved.
So basically you are just trusting that they are telling the truth when they say what they are doing?
Crypto 101:
Don't trust, verify.A brief look at them gives me no reason to believe they are mining anything.
I have 262281 GH/s hashrate for one year
You gave them about $6000 then, when did you do that?
How much of that have you got back so far?