Black Friday prices **** from shoprite

I want to say how dissapoinyed I am with Shoprite and the prices they put on black Friday deals which were not true. I bought 3 pad of always sanitary towels at shoprite which were running for R15 but were never sustracted on the till which I was made to pay R87 unaware untill I had to check my till slip and went back for a refund and returned the items.