Umm ... just my two cents, but I wouldn't communicate with people through Facebook if they didn't invite you to first.

It's sort of like this:

If you just happen to find the hiring manager's home phone number in a phone book, that doesn't mean you should ever consider calling him/her. That's creepy, so I think the same thing goes for "finding" their profile on Facebook, just let that slide.

Also your original cover letter had some grammatical mistakes.

Run-on sentence: First paragraph, second sentence.
Second paragraph, first sentence, "environment" should be "environments"
Run-on sentence: Second paragraph, second sentence.
Second paragraph, second sentence: "and as having great expertise" bad grammar.
Second paragraph, third sentence: grammar, especially "great dexterity" part.
Second paragraph, fourth sentence: "Bachelor's" wrong possessive punctuation.

I tend to agree with the other poster's advice, most HR people are simply buzz-word hunting and your cover letter is simply an excuse to skip your CV, since it doesn't contain any good buzzwords in it and you can't impress the HR staff with cordialty.

Yeah... I'm sure you're all enthusiastic, but do not, I repeat DO NOT track down, stalk, or communicate with company representatives, HR or employees through anything other than the prescribed channels.

That's entirely out of line, creepy, and more likely to get you a restraining order than a job interview. Honestly, the fact that you would even consider that doing such would be socially acceptable would give me a huge pause in even interviewing you, much less extending you an offer.

Also, what's with all the worry about when you should re-send your application/resume/etc. Send it one time through the explicitly prescribed channel, and address it generally if you're not absolutely certain of whom will be receiving it. Don't assume that, because you've not heard anything back, that your application was lost or passed over in error. Most places will make a good-faith effort to let you know your application was received, but this is not always the case -- people get busy. If you don't hear back from them, assume that they don't want to pursue you as a candidate at this time and move-the-fuck on. You've got much less chance of fixing the situation than you do of looking like a desperate idiot, so just stop -- do it right the first time and let the chips fall as they will.

Sorry if this comes across as harsh, but the more you write here the more and more I become convinced that you need a fucking reality check.

As asked earlier, is this company in the same country as you? If not, where is it? There may be some cultural differences in job applications.

My application process when I don't know anyone that works there is:

- Find a phone number for the company and ask for HR. Ask if the role still exists, if so, ask for a contact name and email address.
- If I can't find a phone number, then apply via any method they describe on their site.
- Wait.
- If there is no contact after a week or so, call/email and chase up.
- Repeat the last step till response is obtained.

Quote: Original post by ayush3017
The company is in United States. I made 5-6 calls at the studio but no one was picking up the phone.

Have you taken into account the time zone difference?

Quote: I also left a message on their answering machine but still no reply.

That is likely due to you being overseas with no previous industry experience. Unfair but it is the way it is. Not much you can do about that besides to keep applying to different companies.

Quote: The company websites wants the seekers to upload their CV and cover letter on the company's website. Thats it. No other info no email ids nothing.
You have to fill the app form and just browse your CV and cover letter.

That is pretty standard. Sounds like you are applying for EA or similar large company.

Quote: Original post by ayush3017
The company is in United States. I made 5-6 calls at the studio but no one was picking up the phone. I also left a message on their answering machine but still no reply.

They will never reply, Ayush. This is crazy! You can't get a job overseas this way. You really have to read the FAQs.
Scroll up to the top of this page.
Find the small blue text that says "View Forum FAQ."
Click it.
On the FAQ page, look for the section about applying for jobs.
Find FAQ 24 - "Stupid Wannabe Tricks."
Click it.
Read it.

"Location, location, location."

Also read the July 2010 column at https://www.igda.org/games-game-july-2010