Mobikwik — Mobikwik promo code not working for hp laptop which i got in diwali

Address:	Gurgaon, Haryana, 122002
Website:	www.mobikwik.com

I bought HP Laptop during Diwali and they were offering Promo code of Mobikwik worth Rs. 2100.
In this we have to add minimum Rs. 350 to get cashback of Rs. 350. This is the process for six months starting from Diwali 2015.
The code worked fine for December and January but in the month of February when I applied the code, It was saying "technical downtime, we will be back soon"
I tried this for 4-5 Days but the result was same. After that I send a message to Customer Care regarding this issue. They said, "the offer has been paused for a while and we request for your cooperation while we resolve the same".
After that I tried this after 3 days but the promo code still did not work.
I send them complaint again and then they said, "we regret to announce that HP offer has been taken off. You could not be able to avail this benefit any further".
Help us.