In reply to a post by jelv:

In reply to a post by Apprentice:

......... switch the phone/line rental to an other provider on a short term contract first,

If it helps the op and others, two that spring to mind are:-

http://www.madasafish.com/frequently-asked-questions...

Given who now owns Madasafish I wonder why Plusnet are not suggesting this until their own system lets them take the phone first!