Hello Minx
Suggest you ring medium and large companies. Not a good idea to email or text. Also suggest not to contact Sole Operators (like me) as they usually only have enough work for themselves and do not employ. I am sure you are a polite person, however, even if you get a rejection (or two) accept them gracefully, because your responses may be noted for future reference if an abundance of work comes in. Always answer your mobile (it may be a job). The reason I say that to you, is because if a company receives a job and all agents are out working, they may ring you to see if you are interested and be willing to try you out and that could be your big breakthrough. If you do not answer your mobile, they WILL ring the next available person, however, I am not sure if that also applies to Factual work.
If you keep the above momentum up, you will eventually find work.
Also, have you been networking with other PIs and doing your research on what companies are currently hiring, because it seems G4S is currently hiring and may be a good place to start? Someone also told me that Centrelink is a good area to try (Fraud), however, I don't know what is required to get a foot in the door there.
Finally, for a couple of reasons, I strongly suggest you delete the word 'desperate' from your post.
Good luck.