HDFC Bank — hdfc cashback on debit card transaction

Address: lajpat nagar, delhi

I had purchased macbook on 12.01.2020 with an offer of cashback of rs. 7000 within days upon transaction being made through hdfc debit or credit card. The transaction of rs. 93900 was made by me through my debit hdfc debit card ending with 4917. However, till date no cashback has been received.in fact, i tried to reach customer care numbers no redressal of my issues. I had also registered complaint through designated email of hdfc but no response. This has become frustrating. Kindly look into the issue and provide resolution. My customer id is 68172088