I purchased a coverlet last year and had it lying ...

I purchased a coverlet last year and had it lying on my bed. It faded and changed color. I even had the curtains closed so it wast sunlight that caused this fading. It was very expensive. I sent several emails and no one ever responded to me. On top of this insult, they sent me adds and asked me to rate and review . Honestly, not sure what to make of it.
I thought this company would stand behind their product. My designer is the one that found them and I ordered from Canada. Had to pay extra duty (that I was not made aware of at time of purchase ) but did so anyway. Then the product fades. I sent pictures but no response.