Viveks India — Glen stove - not working

I had booked a Glen gas stove in 19th Nov 2022
I got it delivered on 21st Nov 2022
From the very next day it was not working
Then they sent a person to fix it
It worked only for a few days
Now two burners are not working
I called up Selva from the mylapore branch to sort this out. He gave me Ramanujam’s number
He picked my call once and from the second time they are not picking up the call at all
Would appreciate if someone could look into at the earliest