This must be getting very expensive for you.
You only switched from 50(?) to 10 the other day which would set you on a new 12 month contract
http://forums.thinkbroadband.com/virgin_cable/t/3929... and now you are off to ADSL after presumably paying for a line install.
So 50 to 10 to 8 - are we to expect a downgrade to dialup next week?
If you can't fix it with a hammer you've got an electrical problem.