Xiaomi India — ignorance of service

Address:	Bangalore, Karnataka, 609602
Website:	mi.com

I have ordered mi tv 4a from mi.com on 5th november. However i received product on 14 th november and that too after 3 days delay. I have requested for installation on 14 th november and scheduled for installation on 17th november at 9-12 slot. But nobody came for installation. Then i called customer support and asked them and they told that my installation has been rescheduled to monday (19/11/2018) 6-8 pm slot without informing me about that.
19 th november installation also didn't happen. Then i called customer care and they told me to wait.
I don't understand why they are doing like this.
I have escalated it twice via complaint and another one via reminder.
They told that i'll get call back but i receive nothing.
Now i am fed up with that and i don't want the product anymore.