As an update, I suppose.

For those who didn't believe my story, here:http://community.livejournal.com/bad_service/1418202.html

Yes, my mother did go to the manager. But once she told the manager, the woman didn't really seem to care. The manager said:
"Oh, okay, yeah, I'll talk to her..."
And this kind of stuff happens to my mom and brother all the time.