****** tellers at pick n pay

My mother and i went to pick n pay steeldale to buy a few things for dinner and we get to the till to pay and the casher sends us away saying she is closed there were 3 white people in that que (and i am a disabled person i walk with crutches and cant stand long) so all of us move to the next open till so we can pay and when we looked at that same teller who said she was closed served atleast 6 black people. Now i am very cross because if it was a white person who sent a black person away and only served whites we would be called ****** and i think thats very unfair as we are all equal . and this is not the first insadent at this pick n pay with their ****** staff members.