Vishal Mega Mart — Tandem speaker 3.0 not working

Address:

Vishal mega mart Rampur Uttar Pradesh

I akash kumar gupta mob no. [protected] purchased a tandem home theatre (Speaker 3 set). One year before. My product is under guarantee. I purchased it from vishal mega mart rampur uttar pradesh. Speaker is not working so i submitted it for repairing in vishal mega mart on[protected]. The customer service provider is ignoring my problem and not solving and even not attending my phone. Kindly either repair my tandem speaker or provide me full refund.
Worst service by vishal mega mart and tandem too.