Now I know my maths is poor, but I do know a little about consumer law. I've just come back from the Gap Outlet shop in Lewisham. Garment in question ?39.99 with a 50% Off ticket. Man at till "That'll be ?43.99,please" "Hang on, I says, "it was only ?39.99 to start with" "Oh" Re-does till "That'll be ?23.99." "That's not 50% off", I remark, rather coldly by now "No, it should only be 40% off. It's headquarter's fault" "That's illegal to display one price and charge another" (coldness merging into annoyance.) "No,we have 24 hours to rectify it. We have rights too" Customer service?