Guys, the service centre fixed the problem by adjusting the steering wheel column. They said the alignment were fine and the column adjustment must have been made without my knowledge in some other tyre centres in their bid the set the "alignment" right.

The car still pulls to the left slightly (not as bad as it was earlier) and the reason claimed for this is the uni-directional tyres I am using (Firehawk Wide Oval). Not sure how true it is but I have heard similar version in the past from my friends. I also understood from them that the use of special camber screws but set this problem right.

Thanks for all the responses.