Freecharge.in — Didn't received cash back

Address:	Mumbai City, Maharashtra, 110085
Website:	www.freecharge.in

I availed the offer of 20% cash back on 9 October 2015 but didn't received by cash back(promo code PP20). Then on 13 Oct 2015 also Rs.50 cash back offer was availed but didn't received by cash back (promo code FIFTYCB). I contacted customer support and they said cashback will be provided only if I had paid through Credit/Debit card which was not at all mentioned in message. I am pissed off with their response. It looks like I have wasted my 250 Rs. for this. Please help and resolve this matter ASAP