Just to add,
We were really happy with our agent, His name is Mick Breen and company name is Destination Oz, he previously worked as an immigration officer.
His fees cost us about 1 thousand pounds I know it was a little cheaper than that but just rounding it up.
He was efficient, we didnt have to keep chasing him and he had us organise our paper work so that when we arrived in Oz I had everything to present to the TRA which after looking at my evidence granted me my cert without an interview.
Sorry to here of people being ripped off.
Hope this helps someone as I highly recommend him.