Plextone — Plextone g20 earphone, Not working

Address:

Sai Krupa so. Chale. No. 6 room no 7 Savarkar Nagar nandap Road Manda Titwala east

I have buy a plextone g20 earphone, on Amazon on 13/Jun/2020. And on the date 15/Dec/20 My Right side earphone is not working.