I had the same issues with my delivery.
My Pi should have arrived on Thursday (Using Parcel Force), According to there website they did try to deliver on Thursday, but I never received a card saying that they where there. Same thing on Friday. So No Pi before the weekend and because they never left a card saying that they tried to deliver I was not aware of it either. I was even home those days and never heard them at all.
Monday came and gone, still no word from them... So I had a look on there website and found out that my parcel was been held in a depot 50 minutes drive away. I scheduled a re-delivery for Saturday, 10 minutes later I get a phone call from them saying it would cost me £10 to deliver on Saturday, they said they would be able to deliver during the week before 6pm. No use to me I don't get home from work till well after that
I was left with the option to drive 50 minutes to there and 50 back or pay £10 to deliver on Saturday. All that while they never tried to deliver in the first place as far as I was aware.