Maruti Suzuki India — Security hazard: two different sx4 cars with similar keys

My car sx4vi no. dl9cs 3924 chassis noma3efjcis00131699 and my neighbours sx43caz6694 can be opened and started with each other's keys.
This came to notice when i mistook neighbours car as mine and entered into it opening it with my keys.
Later when i saw some items lying there not belonging to me, i realized the mistake and informed the owner.
This is a real security hazard and serious lapse on maruti suziki's part.
Please look into it at the earliest.
Yours
Poonam khanna
Mob:[protected]