Kohinoor Televideo — voltas window ac dz183

Bought this ac as the consumer exhibition held at bkc by kohinoor televideo.
I paid in full.
The delivery of the ac happened 7 days later.
However 15 days post payment the installation has not yet happened.
And no one is bothered.
I have made 50 calls to the call center every single day still nothing
First time they gave me the number of someone who spoke like a thug and says
Koi request nahi hai.

Later they are saying no problem i will get a call and it will get done.
Stil its 15 days now and the install is not yet happening.
This is the worst company with no returns policy and no escalation procedure.
And what good is an ac if its not installed?

I want to return the ac and a full refund,