JBL — product service

I purchased a jbl c50hi blue headphone from amazon on 14 january 2019 product order no.[protected] and after 15 to 25 days headphone not proper work and product under warranty period then i contact jbl customer care [protected] and they told me that product courier to jbl service centre, service centre address: flextronics technologies india pvt ltd, 302, phase 2, udyog vihar, gurgaon, haryana - 122001 for replace and i was courier product on 01 march 2019 but no response about my product till now. I have many time ask about my product by call and email but no reply from costomer care.
Please solve this issue

My details
Name - rajat kumar
Contact no - [protected]
Email id - [protected]@gmail.com