[Resolved]  Myntra.com — item showing delivered status but never received and customer care refused to take complaint

Address: IIM Ranchi Hostel ,. Hotwar, Khelgoan , national gaming housing society, Ranchi, Jharkhand, 853217

I am highly disappointed at how customers have been treated by myntra support system.
So, i live in hostels where guard recieves the orders, make an entry in register maintained specifically for orders and students collect it after checking the register.
So along with couple of other orders, i ordered american eagle outfitters at rs754 which got a delivery on 6 th oct 2019 as on app. However, i never received any message on my phone following some network issue due to which i was not aware about deliveries.
However, seeing entry in register, i would collect it. On collection of all my orders, i found this particular order was missing! On checking the app, the delivery was on 6 th october. I tried clicking on contact us option, but reply was 'our team would reach you out".. But never received any call.
I googled customer care number today following my trouble with exchange of one of previous orders and told my ordeal, and
This is the reply
"we can not register your complaint because you are 5 days late' "
I kept trying to convince. Them that i always kept clicking on that stupid app contact us option which kept showing you would reach me out.
He said he can not do anything.
I am helpless and clueless on whom to approach!