PTron — Power on issue

Address:

7-7-1/4 ATMAKURIVARI STREET SANKULAVARITHOTA KAVALI

I had been bought a ptron product in July 2021.it was not even completed 3months.i had also raise a complaint it was completed 3days but no response from ptron customer service. my ptron neckband is getting power on and also not getting charge.i have warranty upto 1year.but I can't understand how would I claim that warranty