Delhivery — Medicine not delivered and cancelled

I have ordered medicines through netmeds on 7th may..it's been 11 days and they didn't deliver it till now..
My grandma has to use these medicines without missing even a single time, which will make her lose her eye sight if she misses her eye drops..
Because of both the netmeds and delhivery negligence my grandma is suffering..We are struggling to get the medicine in this pandemic situation..
This is why we trusted this website and ordered medicine.
They have handed it to" delhivery"courier.
The person in courier never called us on never tried to get the medicine.
He stated false and wrong information in the system saying that " we the customer will collect directly from their office", which is a big fake lie.
They never called us and we mever said him..

Inspire of this is, I tried reaching both netmeds and delhivery to make the package deliver to us..

But they simply stated today tomorrow etc and they delayed the delivery and had put the issue on us..
Because of their negligence my grandma is suffering without the medicine..
I want to sue them..if this was the case in abroad customers are treated like God and here in india customers are treated like garbage..
I want the medicine and with proper compensation for what my grandma is facing without the drops.