In addition to Saswata Sir's advice, I would like you to initiate the process before they do so.
In actual terms, a service bond is viable in India to the extent of the training cost incurred on the employee by the employer. There are no specifications of training given in the bond that you've signed. They have not even mentioned that they would provide you training.
You mentioned in your next post about a 6-month training period and ___ months of probation period. Perhaps you missed the number, or should I assume the normal 6 months' probation? From your post, I deduce that you have joined the company in January this year. So, basically, the bond starts from your joining date.
Secondly, I want you to check your appointment letter for the termination clause as the service agreement details are not mentioned. Ideally, in the probation period, there is no need to serve a notice period, or if a notice period is required, it ranges from 7 to 15 days' time. Your service agreement mentions a 2-month notice. However, such long notices are usually meant for confirmed employees. So, check if there are any specifications in your appointment letter.
In addition, you can write the following email/letter to the concerned authority regarding the agreement you have signed:
As per clause 2 of the service agreement that we have signed on DATE, I am to receive the remuneration for the service during the period as mentioned in my appointment letter. In my appointment letter, I have been promised a gross monthly salary of Rs. _____ per month. However, I would like to bring to your notice that for the past two months, I have not received my salary for reasons best known to the management.
This letter is to inform you that I have waited for two months to receive my salary check, and it has been futile. Hence, I hereby state that unless my previous salary is processed, I will not be in a position to serve you. Kindly acknowledge the receipt of this email/letter, stating the earliest date by which my salary for the said tenure will be processed.
We understand that the bond is questionable and not viable. However, regardless of this clause in the agreement, every person who has rendered any service is liable to receive payment for that service.
To cite an example...
Once my TV was not working properly, and we called in many technicians, but they didn't know what to do. One person walked in, checked, and politely said, "Sir, you do not need to give the TV to any technicians or workshop. I'll repair it here itself in 5 minutes. But I will charge you 200 Rs." (This happened some 25 odd years back when 200 Rs had its own value.)
My dad was happy that now he's satisfied that the technicians won't change the parts as he doesn't need to take it anywhere from here. So, he agreed. All that he did was tighten a screw, and the TV worked. It was just a simple thing to do, but he charged a lot. Now, are we to tell him that tightening a screw doesn't cost that much? It wasn't about tightening that screw... It was about applying his knowledge and providing a service quicker than anyone else...
And to be frank, this person earned so much respect. To date, he's the only one allowed to repair my TV, and we don't go to the market to check what others charge as we trust his service.
Please let me know if you need any further assistance.
Kind Regards