[Resolved]  Xiaomi India — mi earphones basic

Bought mi earphones basic on 16/10/2019
Opened and tried it its left speaker sounds horrible after 75% volume. Showed it to the shop owner they said to go to the service center. Service center people say that the song has some noise in it (Low knowledge about sound) then they say that its because of some dust, dont understand how dust goes into a sealed pack product. Even after full volume the right ear has no issue but the left ear is sounding horrible, sounds like a blown speaker. Spent rs600 for defective piece.