HDFC Bank — cashback not received on ipad purchase

My name is shariq Khan, I have bought my apple ipad with hdfc bank debit card on 18/01/2020 from imagine store, select city walk mall, saket, new delhi. as mentioned by hdfc bank (To receive cashback of 3000 within 120 days of the transaction), i still haven’t received my cashback till now, it's been more than 120 days. I have asked in imagine Store, they said to check with bank.

Hope this issue gets resolved and the cashback is credited as soon as possible as i am undergoing financial problems too due to lockdown