1. You can file police complaints u/s 182, 211, 195 of IPC and if she has used any false certificate (medical or
otherwise) knowing fully well at the material point of time that it is false, the you can add section 199 of IPC also.
2. If police refuses to register FIR against your said complaint, you shall have to file a Writ Petition before the High Court against the police inaction praying for remedy and justice.
3. You can file the said police complaint and consequent W.P. at Chennai police station and High Court at Chennai.