From pills that resolve chronic pain issues overnight to diet supplements which promise to help shed pounds in days, the internet is awash with adverts making bold claims. Some come with a celebrity endorsement, where household names appear to give their personal stamp of approval to a product. But many of these are scams, with customers tricked into parting with more money than they realise ever intended. File on 4 investigates the growth of online subscription scams, where customers are unwittingly signed up to schemes which hit them with hidden charges, unexpected monthly fees and products which are made deliberately difficult to cancel. We hear from victims with chronic illnesses desperately searching for a solution to their ailments, who are instead left out of pocket and we speak to the celebrities furious their names are being used to endorse such products. The programme goes in search of those running these schemes online and exposes the tools and tricks designed to scam unwitting customers and sheds light on the creation of a global multi-million pound industry. Reporter: Athar Ahmad Producer: Anna Meisel Editor: Carl Johnston