Anyone else just mega disappointed with Amazon?

I’ve had 5 kindles delivered now, all with varying stages of yellowing at the bottom Of the screen. I bought the first three from shops and the colorsofts from Amazon directly. The cs agent I just spoke to said they won’t replace the replacement of the colorsoft because they would just give me a refund. All I want is a kindle that isn’t yellow at the bottom?!! I can’t even raise a ticket for a replacement for the replacement because the driver still hasn’t marked it as delivered. Anyone else had these issues or am I just cursed when it comes to kindles?