Store Manager at Kloof **** about discount.

I went to Kloof PnP [KZN] @ 8:30 on Friday morning to make some purchases and bought 2 PnP, spinach & Fetta pizza's which had a sticker saying "buy 2, get R25 off". We buy these regularly! The till didn't ring up the discount and the teller said the discount was included! I demanded to see the assistant manager who said the same thing despite the fact that I'm very aware of this price because it is a regular offer. The manager was called and said the discount was included and the normal price was R85? ... I told him he was wrong and was just adding R25 to the displayed price to justify his argument. This is incompetence and lying! We subsequently went to Hillcrest PnP where the manager understood the problem and honoured the discount on 2 other pizza's.