[johnnyfaehell]

In Germany not paying on time results in a default 40 euro fee being owed. Also any costs incurred because of not being paid on time are also owed.

Further more withholding pay all together is a criminal offence which I believe carries serious jail time.

After months of not getting paid you should lawyer up. The legal system is very much on the side of the employee, if you get fired for getting a lawyer, you'll get even more money and possibly rehired. (I know one person who got their job back after going to a lawyer, it was very much not the outcome they wanted.)