Very sorry for you.
Our village area petitiond several years ago and succeeded.
The maximum possible for me on this BT line is 2.2 Mbps though I use Aol 1M at present and exist on promises that this will be doubled at no extra charge in "August or September"
That has slipped from April/May but I live in hope.
£15.99 is extortionate for unlimited Dialup!
I can't remember what I used to pay Aol for that service, but I think it was about half that.
As a result of a series of "more in sorrow than anger" letters I have been charged £9.99 for last 18 months.