Vijay Sales — vise television bought from goregaon west

Bought Vise Television this year from Goregaon west.
Below are details :-
Invoice number -157-Q-SI-16528
Date : 30th July, 2017
Order Number : 104-Q-SOT 2780

Issue is panel of the TV is out of order. We were told that one of your service engineer shall visit our place and take TV for replacing panel. Till date none of your service engineer has come nor any call has come providing us tentative time by which we can expect anyone to fix this issue.
Expecting timely revert / call on my registered mobile number.