1. You can claim relieving and experience certificate only after clearing all dues of employer.
2. No, in fact you owe 21 days salary to employer for quitting before serving notice period.
3. Yes, employer can take legal action against you for recovery of 21 days salary and can impose damages and penalty also.
For further queries you can reach me directly.
Yes. There is only one way by which you can do so. But i cannot share that here. For any further assistance, feel free to contact me on my e-mail "firstname.lastname@example.org"
Shubham Pabbi & Associates
Please reach me at 9794148274 for consultation