[Resolved]  Reliance Digital — AC Installation Not done--Reliance Digital

I have bought an LG Invertor AC from Reliance Digital Kukatpally, Hyderabad.
They promised free installation with in 48 hours after AC delivered to Shipping address. AC got delivered on 27th March . Not received any call with 48 hours and on 3rd day i have visited store personally since they never pick the phone (called more than 100 times some times it ring or some time we will get beep sound but the end your phone will be never answered) .On visiting the store they promised to arrange call back from installation team ).I received a call on 4th day saying that installation status updated as site not ready and they are enquiring me is there any issue at my house. How come the status becomes site not ready with our any installation engineer calling me or visiting the site. A simple excuse to cover the delay. Once i mentioned there is no issue they promised they send installation guy today(5th day). I called multiple times to installation in charge and she picked the call after keep on trying multiple times and told they will come before 6pm and they never turned up. So i have visited the store again and they are not even ready to listen our concern .They will say the standard dialogue it will be completed tomorrow and they gave some phone number of a person who can resolve the issue and he never picked my call. I don't have confidence it will be installed in next week also. They have 7 days return policy and if they come after 7 days if the AC is damaged not sure whether they will accept or not . I feel like cheating and don't know how to resolve it.