She has undergone three months of treatment, which has cost her $2000, and will need more treatment in the future.
The woman said the HDC told her the investigation outcome was unlikely to include compensation for her medical fees.
"I won't get my money back but the company would have to have a complete review of their systems," she said. "I am just fighting this now because I am upset that all of this happened. I had to suffer through this and they may get to walk away scot-free. It is so important that they change their systems to avoid this happening to anyone else."
Since receiving the petrol voucher, The patient said Newtown Pharmacy Mall had not contacted her.
Newtown Mall Pharmacy directors Mark Newton and John Phipps said they were not provided with the name of the patient or her contact details at the time and only became aware of the incident after Wakefield Hospital contacted them.
In a statement, they said they were "co-operating fully" with the investigation.
The Commissioner cannot make an order for compensation but can recommend changes to process.