A while ago I got sent a book that I never wanted and the company
wanted 99p for it. I never sent anything because I thought it was a
scam, and now they have sent a letter saying that if I dont pay in 10
days, they will charge £17.99 for it, and if I dont pay that, I will be
referred to a debt collection agency. How can they do this? I never
applied for the book in the first place - they just sent it to me.