The lower judge will rule in favour of your ex-employer because
it's stated in the employment contract.
You can counter claim it with
1) unclaimed OT over 1 year 6 month
2) working more than 6 hours without pay
3) illegal practice of faking salary to employ
(request judge to check the bank accounts of the company and
employee)
If you got a good laywer, he'll do his job well. If you're on
your own, then you must be calm and explain in great details.
For the abuse part, unless you have a witness, it's hard for the
judge to believe.