Ackermans Ottery did not honor the incorrect pricing

I was at Ackermans in Ottery on Saturday 6/7/2024. They had a sale. Lines were long. There was a rail with a 50% off sign. The red sticker was not 50% off from the original price, as there was only a R100 difference. The item was initially R399. The other rails round the corner from this one was showing up to 50%. I took a jacket for my daughter from the 50% off rail, and a jacket for myself from 1 of the other rails. Eventually getting to a cashier, I am told the sign is wrong, as the items are already marked down. I explained again advising the 1 sign does not say up to 50% off. She calls a superior, Paigan, who is apparently the 2nd in charge, assuming there is no manager on duty, since I asked for a manager. Paigan tells me the board is an error and the item is already marked down. I told her but then I'm entitled to pay what I saw. Long story short, was told it's already marked down, the board is wrong and it cannot be marked down further. nobody was sent immediately either to remove the incorrect board, I put that 1 jacket down, and said I would take it further. Paigan was not in the least interested as the jacket was already marked down. Why must Ackerman's always have terrible staff, yet they offer such nice goods