Jollein Duvet (120 x 150 cm, White)

This doesn't match the description of what I received - very disappointed. It looked like a duvet so I opened the packaging and only after it seemed really stiff when my child was trying to cover himself with it, I read the label. It looks different to the one on the picture here and it says that it is NOT a baby duvet, but a mattress cover! Than I noticed, the product itself also doesn't match the picture, the sewing lines are completely different. It feels stiff and I'm not sure how suitable it is to use as a duvet - probably not. The description provided also says that it is a cashmere (see "product details") - this is why I decided to purchase it (even tho the shipping price put the total up to 30 GBP!!!) The label says "Cotton Mattress Cover". I'm very disappointed since the delivery was fast but the product is unusable (I don't need any mattress covers and on top of that I've never seen a mattress with dimensions 120x150cm.....)