Laned line contracts

[Syd knee]

I mooved the business land lines away from BT years ago and the company I went with were baught out and it has run on and on. I am now reviewing everything and may want to change. The company are now saying I can only exit on the renewal date without paying a seriouse exit fee. the original term ended several years ago. I seem to remember an old piece of law that says you can not be commited because of failure to sign a new contract.
Anyone able to help.
Mods I know my spelling is st can you eddit the heading.

Edited by Syd knee on Saturday 14th August 16:12