Terrible customer service - Matrix Warehouse Princess Crossing

I contacted Matrix Warehouse Princess Crossing yesterday to find out if they have stock of a Logitech K400 Plus wireless keyboard which is advertised on their website for R549. I have previously bought one from the same store at the same price. When I got to the store the same item was marked R899. I confronted the store assistant and the manager and their attitude was "well thats the price" and I must order it on line and have it sent to the store. I told them that it was not an on line price and they checked and confirmed that I was correct. Even then they did not even offer to phone head office to sort this out. The attitude was that there is nothing they can do. Upset, I walked back to my car now having wasted the trip. I contacted Matrix warehouse head office and they said it should be R549. They called the store and instructed them to sell the item at R549 to me. I went back in and paid the correct price. I am sure this store will not change the price on the rest of their stock as they clearly tried to rip me off. They did not even offer to contact their head office. Clearly no customer service training at this store. Stay away, and rather purchase from another branch or head office.