Release of passport and travelling during a case for visa cancellation

Dear Sir/Madam,

I am on an unlimited contract and completed 2.8 years as an accountant in a private company. I gave my resignation on the 7th of September and completed my 30 days' notice period.

Then, the company refused to cancel my visa and I went to labour for cancellation. They transferred the case to the court. First hearing was held on the 4th of November 2018, and then the court extended the case to the 9th of December.

I would like to know, is it possible to release my passport from my employer as they are holding my passport?

Also, is it possible to go back to my home county for an emergency if there is a labour case aganist my company?

Thanks and regards

Rahul Nair