Get a lawyer. Do not use no win no pay ambulance chasers unless you are destitute. Keep a file on every cost arising from the accident immediately, as there is gold in them there bills. I presume you have reported the accident to the store? Check the area for cctv footage that could be accessible on any writ of discovery. Did you have any witnesses? Did you get their personal details?
Just remember. Do not trust the store or their insurers. Also do not trust your lawyer.
Do not sign anything coming from the other side. And whatever you do don’t trust anyone.
This comes directly from your friendly downtown legal professional.