Dear friend,
When did you resign from your job? How many months before this happened?
You should have approached this forum when your employer told you to resign. Senior members of this forum would have guided on how to get maternity leave. Approaching this forum is as good as closing the stable door after the horse has bolted.
Now the challenge is what evidence you have that shows your employer forced you to resign? What evidence you have to show that your employer had committed your reemployment after maternity? Did you record the conversation when you had meeting with the approving authority?
Your employer has taken you for the ride by telling that they don't have rules like maternity leave. This leave is given to the pregnant women under the provisions of Maternity Benefit Act, 1961. It was your entitlement provided by Indian constitution and employer does not have right to deny it. Government has created machinery to ensure that the violations do not take place. But then all this might go in vain with no evidence of denial at hand.
Instead of quitting the employment, all that was required on your part was to put up application for maternity leave. If it was not approved then you could have approached the Labour Officer (LO). No employer would show courage to defy the intervention by the LO.
Thanks,
Dinesh Divekar