M&S use DPD for delivery. These couriers are notorious for cancelling deliveries last minute and not informing customers of this. I booked a delivery for a date and DPD changed it without informing me. When I changed the date back to my nominated date for delivery, I got an email confirming delivery. DPD then changed it again without telling me. I enquired with the M&S helpline and they took no responsibility for this and went so far as to accuse me of changing my delivery date (I merely changed it back to my nominated date). This is shambolic for a company that claims to pride itself on customer satisfaction.