Unfair treatment

We paid R70 for 4 people and left about an hour late and came back after 30 minutes with our same cooler with the same drinks only for them to fight us because of a mere juice we bought from them. The cashier confirmed but the bouncer still fought us and sent us out with no valid reason. We asked them how would it cost to pay for a stupid juice and they said R45 for what exactly !! ******ion at it best! Untrained and lying staff!!!