Lou in oz

I have moved to QLD as a plumber. I am applied for my licences and the gave me a provisional licence in plumbing but denied me a licence in drainage. I have been struggling to get my full licence as tafe college have told me that the whole thing is in the air. I am being told I will need to sit all 66 modules in order to get my certificate 3. This will cost me $16'000. I was told about this gap training before I arrived, but know one here seems to know anything about it. Very frustrating at the moment