Sahara India Pariwar — sahara unique scheme

Sir,
I had invested a sum of rupees 25000/- in sahara unique scheme in the year 2007.N ow since the bond matured in 2017 I went to the branch of sahara india in islam our, bihar dor redemption.B ut the concerned person is not willing to pay the matured amount.He is denying to pay by telling to bring some other potential customer who will invest in the said scheme and then only he will return the money.We as a citizen of this country are feeling helpless.Kindly look into this matter as soon as possible.