48 hour tracked item never arrived with our custom...

48 hour tracked item never arrived with our customer. Tracking says "Ready for delivery" 8 days ago. Royal Mail couldn't get through to depot, gave me the phone number. I've phoned 6 times already in 2 hours - no response, always just rings out.

I've never had such a problem phoning any depot! Normally get through on the first call. What is it with this one?!

Came here to check the number I have, it is correct but it's funny how I've found many other people with the same problem.