You need not worry about the food. Even though it is contaminated with Freon, it is still safe. Freon will cause harm only if a large amount of the gas is 'inhaled'.
The Air Conditioning unit in my office building is leaking Freon into our office. It's been going on for over 2 weeks now. It starts everyday between 11 and 12, I'll get a headache and start to feel drowsy, then my throat starts to itch and burn, then my eyes start to water. By 2:00 or so you can start to actually see the gas leaking into the room through the vent. It looks like smoke. It has actually set the Fire Alarm off 2 or 3 times. The owner of the building keeps claiming that he has turned the compressors off, but each day the same thing happens. I know this can't be good for me, because of the way it makes me feel, but am I at any serious health risk? I read online that exposure can be dangerous for people with heart conditions, which I do not have, but are there any other dangers from extended exposure?
Are you getting uncomfortable to go out to the grocery store like you have a bit of agoraphobia? Even a leak like that in a big house can effect you. It's slow and subtle. A bit of anxiety perhaps. In my opinion you need a new fridge carefully moved in. Good luck