Regarding Education loan

I applied in a branch of a nationalized bank for Education loan of Rs 20 lakh. I started the process in June 2017 and finalised documents on 8th August. I clearly told to the manager that I have to join program on 2nd October. I submitted documents of property for mortgage to the bank. Bank manager told me that he will visit my home to take photographs and submit his report. He did not visit our place nor they do and property evaluation.After around 15 days I received a call from adVocate that I need to submit some more documents for property. On 8 August I submitted property papers till 2005. Later on he asked me for more documents I submitted those documents also. Than day before yesterday that is 28 September after hundreds of follow up I received a call from Manager that my property is in lal dora hence they can not give us loan on such property. My brother is a government doctor and has his salary account in this bank. Bank is functioning on our relative's rented property. Bank continuously was giving us assurance that they will sanction our loan and just because they assured us a lot that I did not apply anywhere else. I was taking this loan to pursue MBA from a reputed college of London and I fit a huge scholarship from the institute. I was a working professional and resign from my job in August to start my MBA from 2nd October. Now since bank denied to give me loan on 28th September I could not do anything because of 4 days holiday. Now my university due to strict rules and regulation has denied to give extension to join program. My admission has got canceled and I am jobless. I want to take legal action against bank as they could have told me earlier also that my property is in laldora and it can not be considered. Please let me know how should I proceed it.