Nykaa.com — Mac free gift

Bought 2 Mac products worth more than 3k, with which i was supposed to get a free gift( lipstick rs 1850/-) neither was i able to add the gift nor was it added on its own in my cart . I hv been calling and writing for a resolve but with no conducive help yet. Got one email suggesting I tk one coupon of ₹300. After putting in requests for more than 3 days, i hv not received a single call from them. Mac products are costly and I bought the second item for the lipstick only