Oh how horrible you must be feeling. There is nothing worse than stressing about your PPL. I've had drama's with the PPL (lets not go there) however from what I can gather, there are laws in place for your employer to pay you and serious consequences if they dont. I would be calling Centrelink to see if they can pay it directly to you (possibly explain the situation) cos Im pretty sure they can take the tax out for you too.

Id also be expressing your concerns with the ombudsman as well.

Good Luck, I hope it all works itself out soon! You really dont need this stress.