Boat — Avante Sound Bar

I have raised a complaint for distorted noise of my Boat sound bar on 17th Oct 21.
Complaint ticket number - 3747768 is successfully approved by service team and got an acknowledgement regarding service visit for repair. Once the technician called me for repair when I was out of station, so I told him to plan for next day. After that no calls received and till date any service visit has NOT happened from Boat.
Major concern is they have cancelled the ticket without my knowledge.
Now they are telling they can't open the ticket again as its a old ticket.
Didn't expect such a poor response from a brand like Boat...

As I have raised the ticket within warranty period and they have closed the ticket without repair. I demand for a repair under warranty.