Small car parking space in Delhi

I baught a flat in uttam nagar Delhi before 2 yrs, And it is resistered in authority janakpuri by sub resistrar. Builder told me at the time of dealing he will provide only three small car parking to three flats only. But he provided 2 more bike parking to top and ground floor also. Ground floor is not resistered in authority they are showing power of attorney paper and it is new paper while they had purchased in 2014, means it's a fake type paper. Builder sold this space before some months as I know because the ground floor owner told us many times he didn't have any rights in parking or front side. Because his entry is from back Side of the building. Builder is denying that he informed us like that. He is telling please bring your car here I will give you space but we all three don't have car right now we bought this for future car planning, due to home loan running right now. Could we say please provide our car space whatever you have mentioned in resistry paper. If so how much area they should provide us for small car parking.