I got in touch with the owners of the workshop and went back there a couple of days later. I must say I am very pleased with the service and very very happy with the work done on the car. If you want to get your car tuned, I highly recommend this place. Also had the pleasure to meet @afnan.bashir
So what was wrong with the car.
The spark plugs had gone bad. The tips were almost gone. So changed the spark plugs (got NGK irediums), cleaned the fuel injectors, and got the tuning done which included cleaning bunch of things like throttle body probably and other things I am not exactly sure of.
So the result is that the missing problem is gone, and the car now drives like if its new. It has become very smooth and accelerates like a jet. I am total in control of the car all the time and thats exactly what I wanted.