Sony India — installation of my home theater promised at certain time not initiated

Address:

New Delhi, Delhi, 110034

Hi,
I have purchased a sony home theater system (Model: ht iv300) yesterday (5-nov) from sony center, rohini. I had booked 7pm installation for the system for today. I was promised that the installation would happen at this time and i will receive a call half an hour before this time from the technician. I haven't received any notification from them yet. It's more than 7 now.
My office is 2 hours away from home. I had to miss my meeting in the office to reach early at home for the installation. This is a wastage of my time and a bad way of not respecting customer' s value of time. I should be notified if there is any delay in the process. No contact details of the technician is provided to me or the sony center from where i purchased the product. I had to call the sony center more than 5 times for this.
Pathetic service and utter waste of my time.
Product and personal details :
My name-sidharth mehta
Product - sony home theater ht-iv300
Invoice no: rh/gst/832/2017-18
Date of purchase :[protected]