Company is not giving experience certificate and also not providing the service agreement papers

I was working in reputed XYZ company. I had a service contract for 3.6years until January 2022. However, I got a better opportunity in other organisations so I resigned during within 3.6yrs of agreement in Nov2022. Now, they are charging upto 4.2L for breach of the service agreement. Their were no service agreement papers provided for employee reference during joining. Now, if I ask them to provide the same for croos validation for the amount I charged. They are not providing it. They are telling it is confidential and can't be provided. Also, the amount charged is not justiciable as per the agreement clauses. I have written tons of emails stating same but company is least bother to respond back to my concerns. I have even told them that I will file writ petition that I am deprived from Fundamental rights of Right to Information. They are holding my experience letter and it is going to affect current employment. I need suggestion whether my case would be valid if I file writ petition directly in High court.