Plz help... Tablet Kuno 4

Dear All,

I have got Kuno 4 tablet and I want to factory reset it, I tried volume up + power button the screen appear with android robot and disappeared.

I searched about root or cwm for it but didn't find any solution.
I tried to contact the company but no replies.

Here is the specs and website for the tablet. http://www.mykuno.com/kuno-specs.html

Please help me guys.

Thanks