Terminating an employment contract due to salary delay for about a year

Hello,

I want to know the legal procedures to file a case against my employer due to not paying my salary from July 2020 till date. The last salary that I've received was in June 2020.

I am still working and doing my duties for the company, but I can not wait anymore and I want to take legal action against my employer and terminate my contract.

My visa shall expire by end of September 2021 and I would like to sort out this issue before the expiry of my visa to avoid being illegally overstaying.

How can I start the process?

And please clarify to me my rights in such a situation and my benefits for requesting to terminate my contract due to this salary delay.

Thanks!