Displeasing experiance and *********** manager

I was at Edgars yesterday to exchange 1 item as I had spent over 2.6K on 05/09/2015. So I decided to take 2 items which was going cost more then the previous item price and I was okay with paying the difference. When I got to the cashier after scanning both items she asked me if I knew the price for the 2nd item, I said yes and handed her my card , she then walked away to get her manager. When they got back he looked at the system and at the price tag and loudly said the price is incorrect instead I have to pay 200.00 more or leave the item .When asked him about the price on the tag he told me that it wasn't he's fault that the price is incorrectly I must take it or leave it. I had no problem paying whatever amount but I certainly had a problem with the manner in which this was brought to my attention and the fact that he was screaming in front of other customers. He then went on to say that I must forget if I think I'll pay less then the price on the system. I then asked for he's name for further enquiry he then said I can do whatever I want he doesn't care. I find this very unprofessional and *********** from management and bad communication skills.