Airtel — night cashback not received

Address:

Jabalpur, Madhya Pradesh, 482011

I have activated 50% night cashback offer by messaging night to 121. It gave me a return message saying that night cashback is activated in my number. But waking next when i checked that if my cashback is deposited. Nothing has been deposited in my account as mbs. I have the same data pack which i had when i last used my internet in night around 3 am. Kindly see to it that my problem is loooked into and i get my cashback back. Or i will not continue with airtel from next time.