Unfair treatment

I was accompanying my friend to look for jeans at the store, when we went into the store no-one said anything to us but when we where leaving the store they checked our bags and found a packet of Dorritos snacks in my friends bag, she then showed them a chocolate that had been already eaten, I also showed them dentine bubblegums and pads. They asked for slips but we both didn't have them as she bought her stuff at work and I bought mine at clicks. They insisted for slips and also called some guy, when he arrived he asked for the same thing, we asked them to stop cameras and check they then said they'll only stop them at 7pm, we insisted to stay until they check cameras. We went to sit at the 3rd floor and some lady who they said is theiracting manager.we explained everything to her she then called 1 security that was giving us problems. They talked all by themselves without calling us in, the next thing the so called manager said to us they will bring back our things then we can leave. We asked them to scan the things to prove they're not ****** or check if their stock is balancing but they never agreed and already we have been humiliated. We know our rights, they must stop & learn