Retrechment compensation / Exgratia / Gratuity

Good afternoon sir. I was working with a transport company last one and half year from March 2015 to Oct 2016. In the month of September 16, the management took decision to lay-off few employees as company was incurring heavy loss and unfortunately I was also part of employees who were laid off. In my appointment letter, the salary breakup included basic salary, HRA, conveyance allowance, PF contribution by company and Gratuity contribution by company. Since now days all companies consider company contribution to PF and gratuity as their cost and include in CTC, same thing happened to me. Till September 2016, whoever left the organisation, they were paid the accumulated gratuity amount as “Ex-gratia”. But when I went to collect the F&F cheque, I was surprised to see that "Ex-gratia" was not included in my F&F, as the HR said company has stopped paying this amount. This was shown in appointment letter as Gratuity cost and it is payable only after five years, so I am not eligible. Sir my query is when company itself asked me to leave the organisation, whether I complete five years or not, I should be eligible to get the “Ex-gratia” or "Retrenchment compensation" from the company. I was asked to submit resignation. They did not gave me any notice of retrenchment. I was asked to submit resignation on 15th September 2016. I was searching for new job in between and when I got offer letter from another company, I submitted my resignation on 10th October 16 and my last date at previous company was 18th Oct 16.. If I don't submit my resignation then they will not issue the Relieving letter, which is normally required when you join any new company. I had been following for my dues through gmail with the management and I have written mail from the CEO of the company saying "The fact that you were asked to leave does not automatically entitle you to extra benefits outside the policy and your employment terms". The CEO has confirmed on mail that I was asked to leave the company, but he is not ready to pay either Ex-gratia or Gratuity or any other Retrenchment benefits. Please advise.