Is "I don't work here" literal or does it mean "I am not an employee of this establishment"? [closed]
While I don't work here means to most people I don't work for this store, you could say
I don't work for the store
I'm not an employee of the store
I'm not employed here
I'm not on staff here
I'm not on the staff
You also could say
I'm not an employee
I'm not on staff
While most people are employees or staff somewhere, those statements are not generally taken as absolutes, but are understood to imply here.
"I don't work here" can indeed mean both things, but in your situation, you would not be misunderstood, so you should stick to it for brevity.