How did you send the resignation letter? By email or by handing over to the department? Do you have the contract by the company with the details as you mentioned above? Have you ever faced any complaints during your tenure with the company? What is the reason for denying the salary and benefits? Since how long you are working for this company? Are you a local hired candidate? How was your stay and transport? Salary bank transfer or cash? Before going to CID make sure, the above questions finds a valid reason and proof. Best of luck.

More than that, however true you are, the name and fame of the firm will make you deny all the benefits. Be cautious. Best of luck..!