Boy this thread deviated.
What are you fighting about? Surely it’s the breaches of the act that are the central issue you want remedied.
The issue of costs is just the icing on the cake and not really what you’re fighting for.
Fighting this side issue is just going to make the OC more mad, and inclined to oppose you more,which ends up in a bigger and more expensive fight.
The fact that the OC has obtained legal representation puts you at a huge disadvantage. I’m going to predict that you are going to lose( unless you lawyer up as well) and the OC is going to go for costs against you.