If ya just want to pay less than you are now why not go with some one like these?
Why have cheap broadband when you can have Free Broadband, compare our broadband deals
£13.75 a month
for the first 3 months
£16-99 thereafter
+ one-off set up fee of £29.99
This is the price for both Broadband and phone line
Line rental is the biggest proportion of that which is £10-50
Ya get free evening and weekend calls too
Although I wouldn't know what the service is like cos I have never used em but I would of thought that unless you will be downloading a load then normal internet surfing should be fine
Obviously this is under a contract tho