There are the Doorstep Selling Regulations (1988), try this...
http://www.dti.gov.uk/consumers/fact-sheets/pa ge24648.html.
The regs give:-
� The right to a seven day cooling-off period during which they may cancel an agreement to buy goods or services worth more than �35 from a trader whose visit is unsolicited.
� The same right to a seven-day cooling of period where a visit by a trader follows an unsolicited doorstep or telephone approach.
The Regulations also provide that:
� Traders who fail to inform consumers in writing of their right to a cooling off period will be committing a criminal offence.
� Door-to-door sellers must provide a notice setting out cancellation rights when any agreement is made. Failure to do so makes the agreement unenforceable. This is the case whether a deposit is paid or not.
There are exceptions for contracts relating to: land; food and drink; certain catalogue sales; insurance; investment agreements; goods or services worth less than �35.
You could try the Citizen's Advice Bureau (http://www.citizensadvice.org.uk/) or Trading Standards (http://www.tradingstandards.gov.uk/).