Headphone Zone — MIVI collar flash headphone Both speaker NOT working

Address:

Seminole Electronics Pvt Ltd. 1st Floor, Plot No 29, Road No 76, Jubilee Hills, Telangana, Hyderabad 500033

I had Raised Complaint On January 12 but still issue not cleared .
Kindly see attachment for date where i raised complaints

I had bought MIVI collor flash headphone on September through amazon,

Now This headphone Both speaker NOT working.

I want exchange now, where should i go, I want refund if its available, i want buy other brands, i trusted your company and buyed this headphone, but within 3 months, bith side speaker is not working, how could i buy or suggest this headphones to other,