Hi Grey Funnel
I also have a Freeserve Email and it has never worked properly, I can send but cannot receive any emails. I too have gone through all their help information but to no avail. You can Email them at [email protected] which is their support address but will need a working Email to receive your reply on. They are pretty good and usually reply within 1 -2 hours.
If you can't get it going as I couldn't then get a Hotmail account here click here you can set up a filter to prevent any junk coming through and works as well or in our case better than Freeserve.