I just found out that the unit we bought is totally the wrong unit. When the time I signed all the legal, loan document in our our mind we are signing the correct unit. But when the time I collect my key and later found out that the unit we bought is totally opposite of what we have requested from the time we purchase it.

As a buyer, what can we do to protect ourself? Its too late to change unit d coz all the other unit we like are already fully booked. Felt like being cheated by the sales person.

Looking for advise here.