@Fitzie effort would be better spent doing your homework before contacting Access Canberra and later HCC.
@Sabbath' not sure why the car was towed but it could have been a cost neutral exercise via roadside assistance (but even when paying it’s a recoverable cost afforded by ACL). The benefit of towing could be that it preserves the intermittent DTC which clears itself with a few engine starts or it defines the owners loss of confidence in the safety of the vehicle. Who knows but not so relevant ATM.
In my view, for those who experience a failure, Holden should do the correct thing and replace the rack immediately, not expect the owner to drive a potentially dangerous car for another 2+ months while Holden get their kit of parts ready (sh!t together).
May be this should have been a mandatory recall forced by the regulator as it would have made the whole process more transparent.