Apple India — I haven't received cashback on my macbook air and iphone XR

I bought a apple macbook air and a iphone xr on[protected] from vijay sales sec-8 rohini delhi-110085 and there was a offer of cashback on hdfc credit card (6000 on macbook air and 5000 on iphone xr) so i bought them on emi of 6 months with a 0% interest rate. As i was said i would receive cashback between 120 days but still haven't received any and even all the emi's have been paid. I want this issue to be resolved please as soon as possible.