Cancellation of franchise from an NGO

We took franchise from Industrial Development Trust of India (An NGO which is claiming to be registered with Govt of West Bengal) for business of potato & paid them a security deposit of Rs250000/-. The agreement paper they have provided on a stamp paper is rubber stamped but not signed by any trustee till now. Just before starting the business we came to know regarding Mr Subrata Adhikary (previous owner of Sumangal Group, arrested for money laundering case in 2014) who is all in all in the company & the main decision maker, but kept another person as trustee whom we never met. After knowing Mr Subrata's past we wrote one application to the company that we don't want to continue & explained them the actual reason that we don't want to continue with the company due to Mr Adhikary's past profile. But the company is not accepting the explanation, not refunding the security deposit (thogh it was mentioned in the agreement that either party can terminate the contract with one month notice) & forcing us to continue.