You haven't answered Nathrao's query about the reason(s) for your absconding. However, irrespective of what the reason(s) was/were, you should have figured out other ways to handle any issues than absconding.
The very fact that you got this notice in 2014—almost 1 year back—and you want a solution now clearly shows that you possibly need your certificate now and have hence woken up. Else you would have just ignored the notice and thought 'hell with the company and whatever they spent on the training... not my problem'.
No Wonder Companies Began the Practice of Keeping Original Certificates
No wonder companies began the practice of keeping original certificates with guys like you around (you can bet your last penny that they know fully well that this isn't right and legal).
But guys like you drive them towards such actions. When you 'use' others, don't blame them for taking appropriate measures as they deem fit to safeguard their interests.
While retaining originals is surely wrong/illegal, are guys like you leaving any other way out for companies?
You very well knew the consequences of your action—absconding—before you did.
Regarding Your Training
Regarding your training, you haven't mentioned your skillset—but since you mentioned the training is related to production, I won't rule out the cost they mentioned (30K). Usually, the costs of the equipment are also included in arriving at the training costs for technical fields, spread out over a period of time.
And since they gave you training, a bond of 1 year will be justifiable legally... frankly, 1 year is very reasonable.
Options Open to You Now
Coming to the options open to you now, I guess Nathrao has already suggested to you.
Finally, a word of advice... if you wish to take it... learn from this mistake.
All the best.
Regards,
TS