Myntra.com — product not delivered,but showing status as delivered and no proper answer to whom they have delivered

I placed an order on myntra on 30th june with 6 items on the order no.:[protected]-5232901 from the id [protected]@gmail.com. Later i cancelled 2 items. Now 4 items are to be delivered to me, while i made the payment during the checkout through online. And among them i ordered dress berry women grey t-strap flats. These people gave me an update on july 2nd the item is out for delivary and in the evening i got a message from them that the product have been delivered. But i didn't receive any call from the delivary executive or myntra that they came to deliver even though i have provided them the contact details. While i reached myntra regarding this issue they told they will investigate the issue. They told they will get back me on 4 working days, later again they told they have delivered. They told they couldn't find out and they will reinvestigate the issue. But again 4days later they again told we need 2 more days to reinvestigate. Today (11/07/19) morning i got a mail from them named incident id - in[protected] as they have delivered the package from their side. While i reached them on a call they told that they have delivered, they don't have one proper answer for my question.

Here,
1) i have provided the mobile number, delivary executive didn't call me
If the delivary executive had called my i might have took the parcel, he failed in that.

2) i complained on the same day within 30min i get an delivary update from them
While i have reached them on the same day if they took the action on the same time on the executive he might have said where he have delivered

3) they are giving an improper and irrespective answer that they have delivered from their side
They are never bothering that are they delivering the goods to the appropriate person

This is completely because of the negligence of the company on product delivary.

While i questioned them
1) to whom did they deliver
2) do they have any physical proof that they delivered order
3) what is the proof that delivary executive had delivered may be he is using my product
4) they were telling they did the investigation, what investigation have they done and whom did they enquire
5) from todays mail we can clearly see that they were no where worried about the goods were reaching the right person or not