HDFC Bank — 2nd complaint - no cashback for apple 5 series watch purchased before 120 days

New complain as no action was taken for previous complain (Posted 7+ days back).

Purchased apple 5 series watch on 19th feb '20 (In poorvika, phoenix marketcity, bangalore) using my hdfc dc, which provided a 4000 cashback within 120 days via 6 months no cost emi option.

It's been more than 120 days and the cashback has not yet been credited.

Secondly, the first month's emi has reduced 500 rupees more than the amount which should be deducted, i'm not sure why as my account had enough money for the transaction.

Been trying to reach the cc, and the call gets auto disconnected after awhile without reaching any personal.