Game does not honor their price beat.

Went to game with a invoice / quotation from a online store and gave it to them to beat the price. Then they said it's not valid because it looks too cheap. I insisted they then phone the supplier to confirm. They did that but still refused. They say they can't do it if it's cheaper than their cost price. They are always selling thing below cost to clear so that's just *******. Very disappointed in this.