Apple India — Problem in the microphone of my IPhone XS

Address: Suri, Birbhum

I bought an iPhone XS from Flipkart in the month of August of the year 2020. Since then I am facing issue in my microphone and I tried to contact the Apple Care many times. They were unable to solve my problem since a year. Therefore I request you to solve my problem or exchange my Apple product with a new one which is not defective.