Xiaomi India - Parts removed during repair

i got my front cover display module and many other parts repaired by xiaomi via mi one assist under mi protect on march ** ****. I then faced issues with my display of my redmi note *.
i visited the mi store at raj nagar rdc on */**/****. i told centre about the issue of phone and repair done by mi in march but he said It is repaired by *rd party under insurance and not the mi.
i was surprised that mi not taking responsibility for the repair.

when he opened the phone, i was shocked to see parts missing from the phone. i asked about it and centre responded that it "It is the responsibility of customer to check handset". i replied, "how would a customer know what is missing from inside the phone unless he opens it? are customers supposed to open phones after repairs from authorized centres?

he said in that case, he cant help.

i want my handset repaired urgently as I am unable to use it.
Thanking you

Customer id *******