Consumer Redressal

Hi Sir, I found myself in annoying situation. I booked Honda City Car with the dealer in Pune. Initially they promised me to deliver the car in Month time during that I requested to change the color of vehicle. They never confirmed me the delivery time just keep giving the fake promises. They also told me they can make adjustment if I will pay the extra amount (i.e. old price with 24% excise duty which is now reduced to 20% recently). I found it very non ethical and straight away called the cust care for Honda. But they also just audience here and not taking any action. Now I would like to cancel the deal even. Even here they might penalize me. Please advise best suitable option to cancel the deal or way to deal with dealer.