A wrong decision

I own indica dls bsiii. I purchased it on 26 jan 2011. I felt it as a very good car, but on 1st april 2011 only after 2 months thae engine started making knocking soung and I was getting no pickup also. On 1st repair it became normal but after two days the same thing started happenig againg. this time they have asked me to wait for 10 days. the defective electrical module costs 20000/-. although it will be replaced in warranty but the replaced module does not carry any seperate life time. what a fun. I have driven only 5000 km till now. most of the local mechanics and owner had the similar complain but no corrective measures have been taken yet. What I observed that internal wiring is not even properly secured. I feel cheated in this regard as I thought that I wont get any big defect atleast for two years.

Their claim about being a good mileage car is also not true I never got more than 15 kmpl.