Delhivery — Out of the line delivery guy

The delivery guy called me today for the parcel AWB [protected] and I said I don't want the product, he said there is a gift to it which I won't get if I cancel the order and I said okay. He said he wanted the cancellation code which I didn't get in my phone and I again sharing any codes since there are a lot of scam with the code sharing and Nykaa (which is where this parcel was from) says not to share any code. He then showed up at my house, even when I had strictly asked him to cancel. He kept pushing that he wants the cancellation code, and I didn't get any code. We (my mother and I) asked him why is he here when I have cancelled the order then he said that he is here to give me the gift, he had told me clearly on the phone that I will not get the gift if I cancel the order and still he was there which is very scary and I am concerned about this situation. His intentions didn't seem to be the best and his tone was bad as well