Flatworld Rewards — No response from flatworld rewards

I have bought a Swiss Military Voice Assistant Neck Band Wireless Earphones from flatworld rewards by going through hdfc netbanking reward section. I made the purchase on[protected], but till now neither i hav received the product nor any confirmation from flatworld rewards about the order.

Contacted flatworld rewards via mail multiple times, tried their number which is inactive,
Even raised this issue with hdfc bank n pay u ..but got no response.
I am very disturbed n disappointed with this incident. I never thought that this fraud merchant is active n neither hdfc bank nor payu is doing anything about it.
They have defrauded so many people n both hdfc bank n payu still doing business with flatworld rewards.