http://www.thisismoney.co.uk/bbphone/article.html?in_article_id=421496&in_page_i...

"Ofcom found that the Post Office had failed to ensure its sales agents gave factual and accurate information with regard to various aspects of its HomePhone service and sales process and failed to ensure its agents explained what customers were signing up to.
It also ignored a commitment  to take special care with vulnerable customers"