Yes. I complained about a rude cosmetician a few years ago via MAC customer service online. Customer service sent me a free lipglass, apology and mentioned they would contact the MAC manager about my complaint.
I didnt know you could complain online. The two girls at Stoney Point Va Mac store are very rude everytime I go there, like its a bother to help me. And they roll their eyes at me when they guy tells me he likes the colors i used.
I guess its too late now I dont live there anymore.