Oh dear, we’ve had this happen to us and it’s not nice, especially if it’s a gift.
First check the tracking details to see if delivery has been attempted. Even for untracked (economy) post it may be that the parcel has been left with a neighbour or taken back to the delivery depot. Occasionally delays happen in transit outside of our control, thankfully these are rare but when they do happen it doesn’t usually take too long for the parcel to find its way to you. If you need further assistance, catch one of our team on chat.