[Resolved]  Sahara City Homes — failed to provide promised facility

we invested a large sum of money in the sahara city homes scheme for confirmation booking of a dwelling unit in ncr region.
neither we got a dwelling unit nor the total amount including the interest back.
when we demanded the amount back we are being provided only with the principle amount without any interest for 3.5 years.
we consider ourselves being cheated by sahara and also the office staff which is the worst ever seen, they do not have any knowledge regarding the schemes, even the senior most staff people included.