Freshstop Caltex only hires ****** cashier's now?

So I go into our local Caltex Freshstop on the corner of Ma***en & Turner street in Vanderbijlpark on Saturday at just past 9pm. I ask for VODACOM airtime when I get home it's MTN airtime. I take it back on Sunday and the rudest most arrogant cashier ever(LUCIA)tells me that I should have checked that it's right and brought it back immediately not only today,then asking me in the rudest way that why did I use it,then after asking did I use it. The way she asked me p*ssed me off sooo bad so I kept quiet and calmly took the slip,went straight to the manager Cassie who then efficiently helped me,however when we went back to the tills for the right airtime,this rude cashier named LUCIA starts telling me I'm ****** cause I went to the WHITE manager instead of the BLACK cashier for help and she continues insulting me in front of her manager without any reason! I have been going to this Freshstop for over 15years as it's the closest to my house,I know all the staff,this new cashier that they hired is a clear indication that Freshstop do not care about respecting their customers or give a **** a bout customer service,absolutely pathetic !!! I won't be going back again!