Ebay.in — Callous attitude towards resolution of complaint by ebay.in

Address:	144022
Website:	ebay.in

I purchased big bazaar gift coupons from ebay on 11th june 2016, and was promised 20, 040 payback points for this transaction (screenshot attached). but i have been issues only 2004 payback points, which is 10% of what was promised. i have written numerous mails, and called unlimited number of times asking for resolution, but what i get as response is
While on call: "we have escalated your issue to higher level authorities, who will look into the matter and respond within 72 hours." but the reply never comes.
If i send an email, a similar response is: "we are committed to help our clients, and will respond within 24 to 48 hours", but those 48 hours have never passed, as i received a reply just once, saying that its a special case, and we will work upon it to provide resolution, which i think was dated 24th june. but no further calls or email were responded to properly. even upon saying that i will go the legal way, they did not give any sign of resolution. please help!!