Understanding Legal Procedures Before Approaching the Labor Court
You should not mention that you will go to the labor court just like that in your first email to the director without understanding the legal procedures in Indian acts.
If your salary is more than Rs. 18,000/-, you will not come under the purview of the Payment of Wages Act. So, you have to go to the labor court and file a case by having an advocate for you under the Industrial Disputes Act, which will be a costlier process. Just for one or two months' salary, you may be forced to end up with legal battles. Mostly, Indian acts will cover low-salaried employees.
Best Course of Action
So, the best course of action for you is to deal with your employer in a soft manner to collect the dues (collective bargaining). The continuous emails and phone calls may prompt them to pay your salary and get rid of you. If you have absconded without serving the notice period, they may consider that salary to adjust in the notice period due and pay the remaining amount if available.
Avoid Emotional Decisions
Emotional decisions will never benefit an employee. You should have sought advice here before quitting a job, which would have been a wise decision.
More details from you could help us provide better suggestions. How many years have you been working, which location, employee strength in India, any office address they have in India, approximate salary package, etc.