Plush Bath Mat (White)

I ordered two of the plush bath mats (white colour). The mat itself is actually quite nice, the reason I'm rating it one star is that the carpets I received had some light yellow and some very noticeable dark yellow stains. Completely unacceptable to send dirty products to your customers, how do you not check your products before sending them?

I'm not sure I can even return them anymore, as I didn't use them before 1 month and through the plastic cover away in which they were packaged in, so not sure they will accept the return. But will try in any case. Very disappointing.