This is a request for advice! Although I realise that some people may think it's a stupid question, or that I have been very stupid...... I bought a second-hand iPhone 6 from someone on EDF, hoping/trusting that it would be a safer place to do so than going to eBay or Gumtree. It was advertised 'in excellent condition' and hardly used, but after a very short time, it became clear that it is far from excellent, and basically, has a rubbish battery and cuts out all the time. I work as a freelancer and a phone is so important, and I am feeling pretty ripped off (?180) as well as my work being compromised.... I politely contacted the seller to let them know that it's not working, and asked to return it and get my money back, but they said...no.... Any thoughts about what I can do?!