Not legal advice just my opinion.
Consider challenging the validity of QLD Police and SPER to issue an infringement, noting, that without establishing your guilt via a competent court of law, they have in fact committed extortion by claiming money from you as well as coercion e.g lose of licence (see Crimes Act 1914) to do it.
I would argue that neither QLD Police nor SPER, both Elements of the Executive arm of QLD Govt, have the statutory authority to determine guilt as they are not part of the judicature, aka a Court, as defined in Part 3 of the Commonwealth Constitution; nor have you been convicted by a court or afforded a trial by jury (Cth Constitution s80 – The trial on indictment of any offence against any law of the Commonwealth shall be by jury) to determine your guilt. Also BILL OF RIGHTS 1688 1 WILL AND MARY SESS 2 C 2 – SECT 12 Grants of forfeiture – That all grants and promises of fines and forfeitures of particular persons before conviction are illegal and void, a current Act of the Australian Capital Territory (ACT) and applies to residents in QLD IAW the Rights of residents in States. A subject of the Queen, resident in any State, shall not be subject in any other State to any disability or discrimination which would not be equally applicable to him if he were a subject of the Queen resident in such other State.