Signing a bond, in my opinion, is borderline slavery. Having said that, this "bond" culture came into existence in part because of people (job hoppers) who quit their job within a few months of joining, and in part because companies have done a poor job in maintaining a healthy job environment for their employees. Employees are forced to leave because they are unhappy, depressed, or harassed in their job.
Regardless of the category you fall under, ethically, you made a deal and you should choose to honor it. If you choose not to pay, there are two bad news and two good news. The bad news is that nothing can stop the company from filing a case against you in the court of law, and you will probably be blacklisted in that company and maybe even in other IT companies (if they share their blacklist). The good news is that since you have a government job, you need not worry about being blacklisted. The other good news is that since our court of law is already overburdened with more serious issues, any case against you will drag on. You can base your defense on health issues, mental stress, etc., and the cost of a lawyer might be far less than the amount you agreed to pay in the bond. The only thing you need to do is not get emotionally affected by the whole process.
Just remember, you are not alone. There are hundreds like you who are stuck in the bond and want out. But how you choose to honor the deal you make depends on your ethics.
All the Best,
Regards,
Avinash Tavares
Management Trainer & Life Coach
youthempowermentsolutions.org