Nokia India — iphone primary microphone stopped working all of a sudden.

Address:

P-49, BLOCK-B, BANGUR AVENUE, "PRIYA BHAWAN", KOLKATA-700055, Kolkata, West Bengal, 700055

I bought a nokia 4.2 whose primary microphone stopped working... Hence i applied for online repair service on 10th june. The pick up executive ecom (Assigned by nokia) shows me that the package has been delivered yet i cannot see any update on nokia official https://nokia.ebuilder.com/auto/repair website.
And whenever i call the customer service helpline, they simply tell to wait for few days.. Is this joke or what?
That's my new phone, with a manufacturing defect detected within a month. I want it repaired or replaced.
It has been 18 days now with no update on my phone
Please do look into it.
Repair order no.:[protected]
Imei no.: [protected]