Paying maintenance dues of previous owner who is MHADA

Hi, I got a flat in MHADA lottery and recently got possession after paying price and all necessary taxes. This particular flat was vacant for last five years although society was formed. MHADA has not paid maintenance charges of the society for five years. As we approached society with possession letter, we were denied membership and also they said we won't be allowed to transfer any of our belongings to flat and no gate pass will be issues unless we pay the dues of MHADA. We conveyed them that we will take this up with mhada if they ask us to pay we will pay, if MHada says they will pay the we won't . Also till then society has denied to take any maintenance charges from us and they will charge 18% interest on it. So please guide me on following 1. Can society deny me entry when I am owner of the flat 2. Can society throw me out or disconnect any facilities like electricity and water 3. we conveyed this to MHADA they said we need not pay anything MHADA will see what to do....so what course of action I should take to start living in flat at earliest Thanks in advance.