Falsely accused at shoprite Eloff street

I was at Shoprite Eloff street to go buy a few items. I am a regular there but on this particular day I wanted to see the hair dye they had since I was there. I then took my items and also took a box of Inteco blonde dye from the shelf which I opened the box to see if all the items was in the box cause with my last experience one item was missing cause I didn’t check. I then through the items in my trolley without placing it back in the box. I decided to leave the dye on one of the shelf’s putting all the items in there. Went to the till and payed my other items. At the door the manager and security searched me rudely accusing me of taking the dye. They saw me opening a the box but did not see me putting the item back. This is unrealistic behavior for them to treat customers like *******. No apology nothing they just told me that I can leave. I am as humiliated and embarrassed.