If this is USA, maybe yes la.. can bising say need to deal based on original price.

Yes there are cases whereby some big brands will 'HONOR' the deal based on the mistaken price.. but this is normal M'sian car dealer.. don't expect much.

Ya la, you can fight for it la.. but whether or not its worth the effort, time and nights sleep you decide.

So you decide if this kind of 'transaction' is worth fighting for as you may feel it's against general trading principles and you feel that the dealer deserves to be thought a lesson.

Just remember people make mistakes and as you indicated the SA made an apology, so perhaps just close one eye and move on man. But that's just me