Myntra.com — Got threatened by Myntra delivery guy

Address: Koraput,Odisha

Hi team,
The delivery guy called me and threatened that he ll make sure nothing going to be delivered to me frm Myntra in future.
Here is detailed case:
I got an update as my order as delivered in the app which was not. same day at night the delivery guy called me and told me he is going to deliver it nxt day morning and not to worry abt the status. Nxt day I chase him like anything and finally it got delivered in the evening by some other guy. Post this the guy called me and threatened me nothing going to deliver to u and how dare me to complaint against him . My simple question is it not my rite to complaint if i dont receive my order on it ?
Is it the way customer should treated ? who ll be responsible of the guy come and hit me or my family ?