Please immediately file FIR against that girl and CAWC Members U/S as follows and flassh it to media: -
120 IPC Concealing design to commit offence punishable with imprisonment.
120B IPC Punishment of criminal conspiracy.
120A IPC Definition of criminal conspiracy.
383 IPC. Extortion.
406 IPC Criminal Breach of Trust.
506 IPC. Ciminal Intimidation.
34 IPC. Common Intention of Crime.
Can the girl file a case of dowry + domestic violence on me even though divorced ?
How can Police tell me that my current marriage is illegal when it was done as per Islam?
How can I deal with the Delhi CM letter ?
You should file the FIR as advised and flassh it to media. Also file Civil Wirt(Article 226) in High Court with that letter of CM as it is violating your liberty as per Article 21 and biased view of CM of the STATE (Article 14) against the STATE.
Can I file a case against the girl and family ?
Yes as adviced above and also Perjury and Speedy Trial.
Threat by CAWC that they would put me behind bars if I dont pay on friday even thought I have anticeptory bail - Is it legit ?
The is absolutely illegal. If you have AB then they cannot do anything. File FIR against each of them as advised above.