From the time you file for mediation on NSW Fair Trading’s website, it takes many weeks, in my cases 2 months, for the matter to be heard by a mediator. As Jimmy correctly points out: mediators cannot issue instructions or orders. That said, in one of my cases, NCAT issued orders to the OC which were ignored.
I see nothing to lose by emailing the committee and agent and if say a week thereafter they do nothing or do not reply, then file for mediation. After you file, let the committee and agent know you filed. This is because it takes time for Fair Trading to process your application and only then will Fair Trading tell the committee. This could be 10 days after you file.
Your matter will be listed beyond the 2 months the OC has to indicate they will fix things.
It is clear they are, as Jimmy states “running down the clock”.
In the event that the committee does the repairs before your matter is heard by the mediator, or at least begins the repairs, you can always withdraw your application. Applying is free and sends a msg to the lazy so and sos that you will assert your rights to the extent (limited that it is) under the SSM Act.