Employer not releasing full and final amount

Send them a legal notice to settle your final payment through a lawyer.

The emails will fly in the air and most of the employers do not reply to the emails sent by ex employees.

Therefore you discontinue the practice of adopting the email mode to communicate the information with the employer in future too.

The letter written and sent as hard copy by registered post  to the employer will be a record and the office copy will be a documentary evidence to you for pursuing the matter in furtherance including through legal forums. 

Now you send a legal notice by registered post with acknowledgment card demanding the F&F settlement giving a fixed time to settle the same failing which, you can inform that you will proceed legally against them for recovery.