those are definitely grey and not FUN608.
Do you know if the retailer has the various SC leather swatches? They specify what each colour is and if they have those, it should be very easy for them to check against the swatches and verify immediately that what you have is not FUN608. SC themselves should also be able to look at pictures of your shoe and tell straight away that they are not FUN608.
Hope the situation gets resolved soon because there is no way you should have to accept something that is patently the wrong colour.