Boat — Left side bud not working

Address:

Chandrala Sandeep Raja D.no:6-360/1 Chataparru road,Near Indian oil petrol pump ELURU, ANDHRA PRADESH 534002 India Phone: 9030112223

After 4 months using my Rockerz 295v2 Wireless Neckband with BT v5.0, IPX7 Water Resistance left side bud not working, i have warranty but customer care number not responding my call i want applying for warranty exchange same problem has came one side buds stop working. nothing, please proceed further process.