level of customer service at that shop is poor. it

I went there to look for formula milk Nan3 for my baby. There was nothing at the shelves. As there was nobody to help there I went to one of the till packers to go check for me behind and she rep**** that the merchandisers knocked off at 17pm she can't get the milk for me. I went to the security guard at the door and I got the same response. I went to the front line manager and she gave me the same attitude. I mean if the merchandisers have knocked off does it mean the Business stops? I was so angry at level of respect and bad customer service I got there. The cashiers name is Letlhogonolo. Does it mean if u are assigned for a specific department u can't assist a customer at another department? Hope their store manager teaches them a lesson. If it was a white person they would have ran to get it BT no bcoz I'm black I receive such treatment. Sies guys I'm disgusted at what happened today!