HDFC Bank — Not Received the cashback promised

I bought a Samsung tablet S6 lite on 26th October 2022 using my HDFC Millenia Credit card from the Samsung shop App. At the time of purchase, there was an offer of Rs. 3000 cashback on my credit card. But even after almost 90 days of purchase, I have not received that cashback amount yet.

I am happy to provide all the relevant information on the purchase. Let me know what information is required.