Unfair service!

I went to CLICKS Thabong shopping center in Sebokeng, on 30th December 2022 at 10h05. I purchased Protex soap bars which are supposed to be R36.00 for 3, and I purchased 9 of the soap bars. Only to arrive home and check my slip.I only recieved special on 3 soap bars out of the 9 yet the advertised special doesn't specify as to how many items can be purchased per customer! This is unfair.