The cards might belong to the store, but they can not touch my k
They can ask me to remove my cards, or take down my card numbers to de-activate it, or tell me to consolidate my cards (which I did after this calling the corporate office).
They do not have any rights to take my keys & purse away. I don't know much about law, but when somebody walk away with your key & purse without your permission, it is just wrong.
It's more along the lines of 秋菊打官司 that I feel like to file a police report, or just do something.