
Loan sanction is based on your loan eligibility and income. Also, banks provide up to 90 per cent of the cost of property. Hence, there may be a difference between the loan amount sanctioned and disbursed. Please approach the bank for a copy of the loan agreement to get details relevant to your loan.
Make an official complaint in writing and obtain an acknowledgement for a copy of the agreement, which is your right. If you do not get a satisfactory response within 2-3 weeks, you can complain to the National Housing Bank (NHB). It is a regulator for housing finance companies. Details are available on http://nhb.org.in/.