Boat — I am completing about my earphones

Address:

A/502 Sankalpana ChS, Near sahil hotel Sion east 400017

I purchase an earphone from amoazon in October 2019, but it is not working, now i had complained many times but there is no response from the company, what can i do, customer support is also not giving me satisfied answer, i also mailed on coustmer support but no response