HDFC Bank — HDFC Bank iphone 11 cashback not received

I have bought my iphone11 with hdfc bank credit card on 11/01/2020 at vijay sales noida. As mentioned by hdfc bank (To receive cashback of 6000 within 120 days from the transactional month end) i haven’t received my cashback till now, it is more than 120 days. I have asked in vijay sales, they said to check with bank. Hope this issue gets resolved and cashback will be credited as soon as possible.