iPhone 11 color fade on top of phone after 1 week

My brand new iPhone 11 that cost 800 has changed colors on the top rim. I bought the red phone and the top has faded to a orange color also around the camera lense. Have owned four iPhones. This is very strange and I have never touched the top of it! I went to store and sales person said he has seen it with older phones . What the ****. My brand new phone is a chameleon ???? Not happy