Regarding My Job

I joined a company in the last week of May. Ever since then these are the issues I am facing: -No salary -Not even a single client's name for providing sales ref.to close the deal (founder claims to have 100 existing clients) -No contact or information of another employee of the company (founder claims to have 30 employees else than me) -No information regarding my medical policy and EPF as mentioned in salary while joining. Yesterday when I asked abt all this in the mail he sent a very lengthy mail saying I am in sales team and have no right to know all this because it all confidential inf. I resigned from my job yesterday. Wanted to know how to safeguard myself as he is a tech guy and deleted my account immediately and now can send any mail from my mailbox to anyone saying it's me. Also, I feel he will not give me my salary by putting some allegations on me. I joined the company even before a month of my delivery due to some personal reasons but now felt liked bluffed. Please suggest how to safeguard