HDFC Bank — regarding cashback not received on iphone 11 purchase

Hi,

I have purchased iphone-11 on the 15th of january 2020 using the hdfc debit card and eligible for 6000 rs cashback, but i did not receive it.

Below are the transaction details of my transaction, please do the needful.

Transaction id: [protected]
Transaction date: 15 jan 2020
Transaction amount: 64900

I haven't found any category to raise my complaint on the hdfc bank site and also i am writing continuously to [protected]@hdfc. Bank.com but i haven't received any reply yet.

Thanks,
Ankit