1) What is employment bond?
The employment bond is basically an agreement which the company and the employee enter into which among the other terms contained therein states that in consideration of the training given to the employee and the money spent by the company in imparting such training, the employee will remain in the services of the company for a particular period.
Source:
Employment Bond: Enforceable Or Unenforceable? | Law Teacher
FOr such case, I believe if your company states they've trained you and hence you're liable to the bond breakage charge, ask them to share with you copies of the training costs that they've incurred.
===
Further in the said source it is added that -
"A case where the company has spent a lot of time and money in training the Employee in return for which the Employee signs a bond for a period of 1 year would be seens as a reasonable restriction. The same however cannot be in a case where the company without giving any consideration requires the Employee to sign a bond"
I believe this clarifies further that since you have obtained no training from the company, and as your manager or trainer or whoever responsible told you and can further endorse that you've been productive in a month's time unlike others who were given training and can give you in writing that you have recieved zero training, your case is strengthened further.
====
What you can do is -
1) First ask the person who ensured you that you were productive in least time without training. Convince him to share the report or data of your performance over the period of time and how many training sessions were given to you.
I do not think here there can be argument on sharing of data. You are seeking performance and training data of your own which I believe you have the right to.
2) Ask a legal person to draft you a mail so that it legally complies and is the warning to the company stating you can proceed further with the matter.
3) Ofcourse being a start of the career, it is difficult to manage a case and give explanation to the next employers regarding this. However, tell them you are not intersted in suiting a file. All you need is a peaceful exit. When the bond is not valid in your case, you are not obliged to pay even a single penny as no training is enforced on you.
4) DO not forget to include towards the end that you wish not disturb the peaceful proceeding of either them or yours if they are willing to relieve you peacefully and agree to the fact that you are not bounded by the agreement that you signed. If however, the company forces you to pay the bond amount, you have no other option but to seek legal aid.
I am sure the lawyer will draft you a letter in the proper language taking into consideration the legal obligations as well as liability.
All the best.