Bad Service From Pick N Pay Odendaalsrus Free state

Today I Went Puck n Pay Odendaalsrus Free state.As The Usual spot to buy food and refreshments daily the service is always good,we are known by half the staff as usual customers,But today we expirinces what ill call bad,immature service from the head of security i think thats his capacity and his senior.After we bought food and drinks my lady colleaques went to the car and i had the cold drink in my hand almost on my way out i had to go back to buy cups….queued and bought the cups then when i was about to leave the security guy ask that i show the slip,asked why he said his senior said i must show the slip….on that the head of Security by the name of Simon approached me from the office and asked for the slip.i asked him why he said be just want to see the slip….he have to give me a good reason why i must show the slip because i asked him why out of the customers walking out and that the shop is full he choose me to ahow slip which i hv and the ladies are in the car,i even asked is he going to ask a lady wheeling a trolley out a slip he said the lady have pick n pay plastic he is not going to ask her.when at the till they ask if u want a plastic and we always dnt take plastic why today,why while i was queueing at kiosk that he goes and check my 10 seconds ago what till i came from….i left ate my food without showing the slip.i hv dealt with customers as long i can remember and i know when i have not been treated well.went back and asked for manager bt was refered to senior of Simon who was biased and didnt care what my concern was that why Simon didnt explain the real reason he chose me he was fuming and telling me that Simon have worked there for long time but what that got to do with customer service.I have the slip in my possession which they never asked for when i return and i still have it.Very Dissapointed With The service