Ours try and charge you for 'drawing up a renewal contract' (£70), even though all we received was an exact photocopy of last year's contract (I checked carefully). We got around it by signing all the paperwork, then I went into the agents with my "P!ssed off Consumer" face, and barked, "I'd like an address where I can make a complaint in writing!" to the girl behind the desk. Cue bunny-in-headlights look; she rummaged for a managerial business card and handed it over. Before she could recover I laid the new contract down on the desk and said as if it was an afterthought, "Oh, this is yours as well," then marched out.
We've never heard from them with regards to this £70 since

Sometimes it pays to be able to look like a dragon.