I purchased bluestar 1.5 ton split AC from chroma Vegas mall. While installing they didn't provide bill for what they have installed extra copper wire, extra wire black and white and pipe. They replyed that they will whatapp me the bill. Even they didn't give us the main bill and warranty card of the AC, because while purchasing chroma told us that the main bill be generated while installing the AC.
And the most important point they have very high charges of the wire, pipe etc and while making the final bill they take into account 1-3meter extra wire and pipe charges.