Mitabyte has lost a regular client.

I am a regular at mitabytes. I go there a couple times a months for a very long time. I want 2 gigabit switches. I was told that the gigabit poe switch was R469 ( on black Friday special) and I've driven from well over an hour for this and when I got there I was given the products ( 2 poe Switches). And was told that I was given the wrong price. I communicated directly with the person from the store yet they aren't liable for this? What happened to the customer is always right? I had it written in hand. They should of given it to me at that price specifically because i drove along way for i and because that was what i was told. I will no longer be doing business with them after this.