Medlife — Didn't deliver the medicine but charged money for it

My order id for medlife is or 1517pgb005a. I subscribed for medicine on medlife app. They delivered the medicine on 8th of august 2020, but when i open the package one of the medicine named (Mucinac 600mg 60tab) were missing from the package. It was mentioned on delivery slip but was missing from the package. They duped me around rs 1500. I immediately contact delivery boy, he told me that he deliver the whole package as it is and infact deliver package was intact, basically medlife never shipped the package. When i complained about this matter to medlife, they only gave assurance.