Durrani thanks yar.
This won't solve the matter.
I agree with capsat, Actually i came to know the following.
As this practice is a common norm among all bilal gunj shop keepers. Most of the time people go to them and fight with them.
They rais some kind of fund, that they give to a lawyer. Whenever their is some fight, first of all all the shopkeepers gather suddenly and will out number you, even if you are 20 to 30 people. They will get together and beat you, If you approach the law, they will not come to the court. Only thier lawyer will come. This will wast your time and money both. So becarefull before taking that step.
I pondered a lot on this matter and at last i decided that others should be aware.
whenever you go to these people don't pay them until you agree on terms and conditions and warranties or unless you are satisfied with whatever you are looking for. Tell them straight that you will only pay if you are satisfied.
You will not believe that i have spent 100000 till now on this stupid engine and on the after affects till now.