I Face Mango Pants Color Change After First Wash Despite Following Care Label

On Saturday, September 30, I purchased a pair of pants from the Mango store at Konya Kent AVM, paying by credit card. Before wearing the item, I followed the washing instructions on the label exactly, but after the first wash, the color of the pants noticeably darkened. I am certain that I did nothing wrong during washing.

I still have the receipt, and I request that Mango review this issue and replace the defective pants.