next time go there again and tell them "excuse me, if you doing this again, i will report you to your manager or worse I publish your low level services in paper".  Hope that wake them up.

yeah.. I have same problem too at the beginning they totally ignore me. But now they see me there atlest 3/month shopping like crazy, now they all smile and treat me nice. but still is not good experiences at 1st time.

Everybody is right Everybody is wrong, it depend where we stand.