CompuIndia — paytm cashback not received no response from compuindia

Address: Salem, Tamil Nadu, 636001

Website: www.compuindia.com

I purchased a product on compuindia. Said received a paytm cashback offer
Still i not received a cashback from paytm & compuindia
I made transaction on dec 18 2017
I wrote a mail many times to [protected]@compuindia.com
Said wait for 15 days. Still now i received cashback from compuindia

After i wrote a mail to [protected]@compuindia.com, said this offer provided by dell.
This is not proper response from compuindia. Why i can ask to dell
I purchased on compuindia only

I need my cashback please lookout this issue

This is order id : xxx285842