HDFC Bank — Cash Back not received

I have bought my iphone11 with hdfc bank debit card on 13/12/2019 in Faridabad. 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. . Hope this issue gets resolved and cashback will be credited as soon as possible.