HDFC Bank — Cashback not received

I have purchased a macbook pro 13"on 28 january, 2020 with rs. 7000 cashback scheme from hdfc bank. The payment was done using hdfc bank debit card and the payment receipt says""you are entitled for a cashback of rs. 7000 on your transaction. It will be posted in customer account within 120 days from the last date of transaction month on a best offer basis to all open and active card members accounts only".

Now, it's been more than 120 days and i haven't received any cashback from the bank.

I would like to receive my cashback in my bank account as soon as possible.