Change of Policy without notice and Applying it in backdate

HR Question
I was working with an organization for the past 3 years. We had the leave policy that was uploaded on the company's HRMS portal, it said that leaves will get encashed as per Gross Salary.
I was offered a cross-department promotion sometime in August 2018. I refused the promotion and told them that I would not be able to do justice since I will be leaving in a few months. This entire conversation was verbal, done through a skype meeting.
On Nov 21, 2018, I resigned and with prior discussion, my last day was set to 31st December 2018. However, it got extended to 10th January. Till this date, we never received any communication regarding a policy change in the Leave Policy.
I can see that they have uploaded a new leave policy on 14th February 2019 and made it effective from 01st of November. So, they are creating backdated documents and policies, to cheat their employees.
Can I file a criminal case against them on the grounds of document forgery?
umakanthan53
You can file a Civil Suit against the management for the breach employment contract and claim damages only.
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