Flipkart — Voltas 1.5 Ton 3 Star Split Inverter AC - White

I have purchased AC on April 8th and got delivered on April 9th from flipkart, It was given as April 11th for installation to complete. But none called me or showed up for installation. I called flipkart hepdesk and they told me april 15th is the date they will arrange installation. I asked for senior manager to talk to me and they brought someone into call and she just hung up while I was explaining my situation to her. This is such a worst experience for any customer and told them will complaint it.
This is the second time with flipkart, last time when I bought a laptop form them, it produces so much of heat from day 1. No service was offered and it is not returnable as well.