Jane - please don't name them on here - IM if you wish, but is it a reputable breeder you've gone to? If so then chances are things will be OK. Some people are not that good with the paperwork and it can take longer than it should. However, less reputable breeders have been known to never deliver this part of the deal, it can then come down to involving solicitors etc under the Trade Decriptions Act.
All being well, you'll have just hit a paper-phobe
and it will come through. It is a good idea to keep the contact up though. Is the breeder close enough for you to visit? If not, drop them a line, keeping a copy for yourself. If you still get no reply, send another by recorded delivery, again keeping a copy - just in case
It just worries me a little that you didn't even get the pedigree. The KC stuff often comes later, but the pedigree should have come with the puppy.