The Bond was created in lieu of what extra ordinary favor by the company:::::e.g. some certified training from some authorized/approved Instt. that would add to your qualification??
Under what circumstances you had to sign the Bond::::: e.g. did the company place it before you after you had resigned from previous employment.......................and no condition of Bond was informed in job. advt,interview call letter,selection letter,offer letter, appointment letter etc..............................and you had no other option?
Was any promise made to you verbal or written e.g. some training,some foreign travel etc.................in lieu of Bond that was not kept?
Did the employer breach its own contract e.g. delayed payment of earned wages, extended work hours but no OT, no compensatory off,unauthorized deductions, non issuance of salary slips, non payment of incentives,reimbursements, no provision of statutory benefits like PF,ESIC,Bonus,Gratuity, rude/coercive/threatening conduct etc that would render the employer unworthy of being employed with?
You may show the job. advt,interview call letter,selection letter,offer letter, appointment letter, HR policy/Service Rules and regulations, salary slips,attendance record, OT eligibility letters issued by company,legal notice etc to an able labor law consultant/Service matters lawyer and give inputs in person and proceed under expert advice of your lawyer....................
A fitting reply to the legal notice by your lawyer may put the matter on SHUT UP MODE!
If the company pulls you to the court then you may contest in court and curt may award pro rated payments or decline to award any liquidated damages to the company.......
Are you a member of employee's/trade unions?
The union leaders can also help!
The lawyer that has examined the docs on record and your inputs can advise you the best.
Approach your lawyer.