Airtel — cash back offer not credited my airtel payments bank account

Address:

Srikakulam, Andhra Pradesh, 532408

Hi
My name surya. Recently i booked my train tickets thought the irctc account.
Used your airtel payments bank account
Seen your cash back offer 1st and 2nd 3rd bookings and minimum transaction should be 500 your terms and conditions
Cash back money should be crieadited in my account 3 business days told you but. Not crieadited i books my journey tickets.[protected]. Cash back money not credited.
Here are my account details:
Name: gangu murty
Account number: [protected]
Bank name: airtel payments bank
Bank ifsc: airp0000001
Please cheak status. And send me feedback what is the reason
My email: narayanasurya045 @gmail.com