FT NSW in several instances offer to provide further advice on where to go if they cannot resolve the matter.
In the reverse of your situation,
FT NSW has spoken with you and has your formal complaint. There is some hope they can point you to the next step, if the complaint is not resolved adequately.
Per @phb previous suggestion/advice,
There is an assumption that in pursuing consumer rights all of the facts and claims on the business are reliably documented. There are several other threads in the community and on the Choice Consumer web site detailing how to best press for resolution under ACL. If you have missed it one recent thread.
