Staff not honoring prices on items

Yesterday I went to Truworths at the Watercrest mall in Durban and picked some kiddies clothes that were on sale. After spending so much time in the store I go to the till to pay only to be told that the sale only starts the next day. The sign is on the extreme left of the window and not near the entrance so noone will ever notice! It's very deceptive or stupid of the staff!! They were not interested in customer service or honoring the price on the shelf. Every other store in the mall had items on sale on the 30th but the truworths staff jumped on the wagon to pretend to be having a sale but were not honoring the items marked down on the 30th. I am also management in Retail and we highlight honoring prices on the shelf, excellent customer service and diligence of staff members to name a few. That means if the sale starts on the 31st, then prices are adjusted on the morning of the 31st before the store opens . It's only logically. I always have a bad experience at Truworths and as a result avoid shopping there. I am hoping someone cares enough about this company to right this wrong and perhaps give me hope as a future customer!! I have 2 babies and its a real effort for me to go shopping after work hours. My time was wasted by *********** staff which don't respect other peoples time not company Ethics is unfair on both parties.