Subway complaint: Gave me cookies with nuts in it – ended up in hospital

Went to Rockdale subway. purchased the same meal I have had before – footlong pizza sub, with two rainbow cookies and a drink.
Specifically asked for the two rainbow cookies as I have had them before and they don’t have nuts in them. I have a nut allergy. Due to having these before, I knew they were safe.
Instead I was given two macadamia and raspberry cookies and not told. I ended up taking a bite, getting anaphylaxis, having to use an epi pen and call the ambulance. pretty serious.
I contacted subway. they didn’t answer their phone multiple times as they took it off the hook. I went to the store when I first took the bite. the guy who served me, the manager bushan, admitted he gave me the wrong cookies.
When i contacted the head office, they firstly denied it, then lied saying they had left voicemails which they didnt, then when i finally spoke to bushan, he kept changing his story.
I want a formal apology, refund for my meal which i still havent gotten, and them to pay for my ambulance and medications.