nayajersey mitra, kasari thaha vhayo timro sastha li timi arko kaam khoji ra chau ya kaam pahi sakau. La thaha vhayo re aba k garne ta? Mitra chinta nagar, several upaya cha.
First of all, katti magi ra cha training ko? 1000 - 1500 ho vhane, aakha chimle ra deu, mahile 700 diya ko thiya training since i was living on my own.
Haina teyo vhanda badi magcha vhane, k k ko ho itemized bill dekha vhana.

Tara yo garnue vhanda agadai kehi upaya lagau, tell them you are planning to go back to your own field and looking for same entry level positions.

Mera 3,4 jana sathi le training auta bata liya, teyo contract pani sign garya thiya, kaam arkai bata khoje, ahile h1 pani vhaie sakyo.

Sathi le kaam khoji ra ko ani pako kura teyo sanstha lie sunaue nu hudaie na ni.

Also, uniharu li pani dhamkau, timi haru le kahi garna sakae nau, marketting ni naramroe.

Sathi finally, kehi dar mannue pardaie na, ma timroe tham ma vhako vhaya bal dinna thiya, afnoe kaam garthiya. Yesta mula le dham kaune matra ho, katti illegal kaam huncha teyo consultancy ma you know and I know, and tesko baje le nue khojya che vhane hami ni tesli dham kau ne ni,
Tara 1000-1500 saya ma kura bancha vhane chahi milau, 3-4 din ko kamai ta ho ni....
la sathi ko ramro hos...

You don't have to give them even a dime. They are taking advantage of you. Even if they had given you a training, they should have taken the money before you join the training. This is America man and you can give a $shit after you leave the company. You are not liable for anything.

Please don't fight with them and don't give any information of yours like address, phone etc.
Simply ignore them because they can't do a $hit. Just concentrate on your current job and good luck.

 As sajamitra said, just walked in your own way and do your job. Change your cell phone and contact information. Even you signed the contract i.e.$60K per year. Then, you need to get pay check and tax. This is america and there is fair job practice. They are trying to get advantages from you, asked send all contracts/signed document. Even if they are keep on harassing, asked filed complain to labor department. You are not a bound labor for any shit compnay. 

Good luck for job  and stay cool without accepting any call/papers from them.

Thanks

i personally don't think you are liable to pay anything to them, I have seen guys sign a contract and leave the company without telling them.
And good luck with your new work.