Well judging by a recent experience I have had with a non appearance of an ordered certificate, I would say they could cut costs by sorting out their staff. 
After 2 weeks of cert not appearing, I sent an email. 2 weeks later with no reply I phoned and the answer was, ahh you don't have a post code on your details on the system so the post office won't be able to find you.
I replied something along the lines of well I've had some hundreds of successful certificates from you without a problem!
Sorry I'll add your postcode in and can you send an email asking for a resend!!!!!

So I resent another email and eventually my certificate arrived and thankfully it was the right one! 
Not exactly an efficient complaints system
Kerry
Yeah I had a similar experience yesterday & today - Spent 10 minutes 'in a queue' with (and I quote) " there are currenty ZERO people in the queue ahead of you" ......... ok well mr or mrs Zero spent 10 minutes on their call!
When I got thru & actualy spoke to someone & explained my problem - that the childs 1st name & the last numbers of the index were unclear & how did i order the cert as I needed the parents names from it so I couldnt supply them to check it (I KNOW its mine, the chlds name is very unusual)
the answer I got was to pur BOTH numbers I thought it might be on the reference.......... and if that didnt work to order it & call back after
OK , so I went to order it & it wouldnt TAKE both numbers cos it will only take 6 digits in the page numbe - and I had 8!
So I ordered the cert & some others, noted down the reference as I had been told to ............... called back today & queued again .................. only to be told by someone else that they couldnt access the order to do anything and if it wasnt right they would 're-index' it (whatever that means!
wish they would all read the same info sheets before giving advice cos i will NOT be happy if I have wasted money cos of incorrect info!
Gaille