Employer not providing relieving letter - what I can do to get the relieving letter?

I joined a private organization (OperativeMedia) in Bangalore in 2017. After working for nearly one and a half years, I submitted my resignation on 30th Oct 2018. I served the notice period of two months and left the organization on 27th Dec 2018. I wasn't handed over any relieving letter on the day I left the organization, but the HR insisted that he would soon send the relieving letter in another 10 to 15 days.

Now more than a month has passed, but he hasn't sent any relieving letter to me. I sent an email reminding him of the letter, and he said he would be sending it in another couple of weeks. I think he is intentionally delaying and has not provided me with a resignation acceptance copy. Can anyone suggest what I can do to get the relieving letter?

Hi,

Keep contacting and communicating with the HR, and after a couple of emails, mark CC to the management. When marking to the management, make sure to acknowledge the email of the HR wherein he had promised that the relieving letter will be sent in 2 weeks' time to bind him. You may use that email as your relieving letter just in case it is needed in the meantime. You may even indicate that you will be using his email acknowledgment as the relieving letter so long as you do not receive the official copy. Keep your letter of notice and other docs intact for any future use.

Thanks and Regards