[Closed] USPS's UK agents?

I'm assuming this is still Royal Mail/Parcel farce?
Looking at the tracking of my parcel (bike parts), it say the "Attempted Delivery Abroad" yesterday.. to site with 24hr security staff (who I trust) in a gatehouse to the site.
Personnaly I believe, who-ever the UK agent is, is lie-ing through there teeth, but is there any way I can contact them & try and collect it from the 'sorting' office?
(no card, as they never came to site)
As the last thing I want is for it to be returned to the US.