Performance is not up to expectation

I have purchased this car on 4th Dec, I had a bad experience with the Engine performance. even in the first gear vehicle stops and we have to accelerate to get the move. Vehicle would have been good with 1300cc & 1.2 to 1.3 L engine for such a vehicle. Apart from this I'm facing issue with the noise in Break Disc and it is not rectified in first service. Also, have a noise issue with A/C. Totally, it is not up to mark and it looks like brother of Maruti Vehicles with less than 1000cc.