I am sorry to hear about what you are going through but we cannot assist.
Solicitors that may be able to look at this for you are Maurice Blackburn as they are a fairly large firm
Also it appears that the government department may have failed in their duty to investigate and if you have not seen the NSW ombudsman and reported this you may wish to look at that option as well
If you suspect corruption in the Govt Department then ICAC may be a party that the solicitors you use may want to involve.
If you want other referrals the Law Society of NSW can give you names of other larger firms that understake no win no fee matters.
Their website is https://www.lawsociety.com.au/
I am sorry I cannot give you anything further
I hope this makes sense and is of assistance. If you wish a phone call please elect for one but be aware it will be an additional fee. If there is nothing further thank you for using my services.
If I have missed anything, or you have any further questions please let me know
If there is anything else in the future please do not hesitate to ask.
Please do not forget to leave positive feedback.