Home Delivery Network lose my parcel..

So I've been sat around this afternoon wondering at the back of my mind whether my parcel will arrive from Marks and Spencer .. when I went online to check my emails I thought to myself I'll just find out where my parcel is up to.

Apparently it was delivered to this very address at 12pm yesterday.

There is no parcel here. None of my flatmates have signed for a parcel. None of my neighbours have received a parcel.

Where is my parcel???!

Apparently I have to wait until Monday for Marks and Spencer to contact the Home Delivery Network and find out where my parcel is. And more importantly WHO signed for it?? I could handle it if they had tried to deliver and nobody was here - hell I could handle it if they had left it outside the front door and it had been stolen.. but no, somebody somewhere has my parcel and nobody seems to know who. I'm not happy.