I think the previous post was right in that it always pays to read the agreement. However if you are sure that it was a PCP you asked for you could make a complaint to the FLA ( Finance Lease Association) @ www.fla.org.uk Basically the Finance and Leasing Association is the industry body for the asset finance, consumer finance and motor finance sectors. There is a consumer complaints procedure and the FLA has been trying to help people understand the different types of finance available so they will investigate provided the dealer is a member.
Hope this helps.