I've worked in a company for four months(bpo), then I had to quit I informed my manager, TL and HR too. They were like serve notice period or your name will be blacklisted from nasscom and you might get future employment troubles. I had my personal reasons to quit. Later I received a mail stating that in no call no show mentioned in it was to pay fnf settlement which I did not notice. later I receive mail saying I have to pay the company an amount of they will take legal actions. Firstly I did not sign any contract and I informed about my resignation, no one told me about the penalty. All they say is mail to the HR team. Yesterday I received a mail saying that if I don't pay they'll take legal action, my mental health is getting disturbed. I'm uncertain what to do will really appreciate if anyone helps.