Airtel — Cheating customer with false promises on discounts

Address:	Bangalore, Karnataka, 560068
Website:	www.airtel.in

I have purchased Airtel wifi hot spot device on 16th October 15. As part of dongle exchange offer I have been promised a cashback of entire device cost and the respective amount on a monthly basis will be discounted in every billing cycle.
I am supposed to get a discount of Rs. 248 every month for a period of 9 months.
But the promised discounts are not reflecting in the bill. Customer care is saying that they don't have any information and are not taking any ownership.
The response from Airtel customer care is pathetic and doesn't care to resolve the issue.

I request to look in to this matter and resolve asap.

My Airtel Dongle # [protected]
My Alternate contact # [protected]