What else can be done? Bring an action against your employer via labour court. Bear in mind that unless your employer dismiss you (unfair dismissal or constructive dismissal) your action should lies in labour court and not Industrial Relation court. Labour court is very informal, you are entitled to bring an action without the involvement of counsel.

In my very own opinion, if your colleagues are receiving the same treatment as you, you can bring a class action on behalf of the employee against the company through a civil action (not so sure about this, ask a lawyer who specialise in labour law), if you are treated differently from the rest, you can complain that you are discriminated in anyway in the labour court. Still you must think about your employer perspective, as they might be facing financial difficulties during such financial turmoil, the court will take that into consideration and the fact that your employer did pay your wages or salary and they did not purposely withhold your salary or wages in bad faith.