North Freeway Hyundai

I've been here a couple of times before. Everytime I dread talking to the service rep. He just seems unintrested in what you say, rarely even makes eye contact. I feel like giving up and telling him "go ahead and just figure it out on your own". Just recently I came in for a more serious issue, a more costly issue and come to find out, I was also being over charged by over $50.00. Good thing was that I had an idea of what needed to be replaced and called 2 days prior to bringing my car for prices on these parts. I understand it can happen somtimes but this is a dealership not some small mechanic shop. The prices are on the screen in the parts computer. How could it change from the screen to when they printed it out. That just made me wonder if I should continue bringing them my business. So, now I'm searching for a hyundai mechanic again. If you have any advise let me know. Thanks