Date of Exit correction after 4years 10 months

My payroll company was XXX, and the client company was YYY. I have the offer letter and the relieving letter from XXX company. The client company only accepted written resignation letters; hence, I provided the written resignation letter to YYY on August 1, 2018. As per company rules, the salary should be on hold, but I received the July month salary on August 3, 2018.  I became skeptical and sent intimation mail to the XXX company stating that "I have provided the written resignation letter to YYY on August 1, 2018, and my last date of working will be August 31, 2018, including the 30-day notice period. This has been accepted by the Clinet manager name and client HR name and also informed Payroll Company YYY HR name. Please guide me if I need to inform anyone else and guide me through the relieving process." I also attached the resignation letter copy to this mail. For which I received an irrelevent reply from XXX company that "you will get the relieving letter once the FNF is processed.". I received the petrol conveyance on August 20, 2018. Once again, I raised a query to the XXX company on the same mail regarding why my conveyance is not on hold, for which I received no reply. I was relieved on August 31, 2018. and joined another company on sept 3, 2018.  I received the FNF settlement on April 8, 2019, after 8 months. I received the resignation letter in mail from the YYY company HR on May 8, 2019. After 9 months of relieving. But the date was mentioned wrongly as September 11, 2018. I immediately mailed back that the date is wrong and I want it corrected with a copy of my resignation letter. for which the HR replied with the mail attachment from my reporting manager that the date of exit is September 11, 2018. I immediately received a call from the YYY company HR stating that it was updated by my reporting manager, and you can contact him. I called my reporting manager, and he said he could not help as he had moved on to another company.  This was my first job, and I didn't know what to do and left it untouched. Now only it is creating problems for me in background verification. I reached out to the company with two proofs: 1. The intimation mail conversation with XXX company during the time of resignation. 2. The mail conversation with the YYY company HR stating the date is wrong in the receiving letter. The YYY company is not ready to correct it. They have been mailing back and forth for two months without any conclusion.  Kindly suggest to me how to get this corrected in the UAN portal and re-issue the relieving letter. It's been 4 years and 10 months now. Should I reach out to the labor court or criminal court for misrepresentation of date/data or document forgery?