Horrible, horrific and terrible service at Clicks Bronkhorstspruit

I had a terrible service at Clicks Bronkhorstspruit yesterday!! The manager was soo rude ad forcing me to take a product that I ddnt want and which I ddnt take, she was soo insensitive! They put a notice next to sensodyne toothpastes to say "buy any 3 sensodyne toothpastes and get the cheapest one free" I did just that, and when I got to the till the third product couldn't minus, then I tried asking why, then the manager said "cant you see that the flavour you are having is excluded from sale" i asked how am I supposed to "see" that when the note said "any sensodyne toothpaste" what is the meaning of "any" then that was when I received the backlash from the manager who said "can't you read or see that the notice us put at a certain row of sensodyne toothpastes flavours and not the one you took" the poor cashier wanted to help me based on the words "any sensodyne toothpastes" and the manager told her that if she does that, the difference will be deducted from her salary!! This was hellish and sour and I left the toothpastes right there and as I was making my way out the manager insisted on shouting at me to saying "you need to see and read read our notices properly" OH MY GOD this was soo horrible! Horrific experience I have ever experienced!