Bad service

Went to truworths today to buy a watch. We saw a watch for R99. When we want to buy the watch a sales assistant named Catherine told us the price is R399. I told her I want the watch for the price as advertised. She went to the manager who said the regional mamager needs to be phoned first. I asked the manager do they alwas phone because if you buy something for R20 and it's more when you get to the till wont you be upset she said sir I am not going to argue with you further and phone the regional and area manager. After waiting about 30 minutes she came back saying sorry it was a human error and we cannoy let you buy the watch for that price. Was this my fault that a human error was made or the management that did not do their job. Not once did the manager Elise apologize or ever offer a lower discount. I am deeply disappointed in the bad service and bad attitude from the the sales assist Catherine and store manager Elise. Not to mention the area managers that just don't care how their customer is treated.