i wanted to sell my iphoneSE to back to sky in a sky trade in i was sending two phones back at the same time , and they got mixed up , the iphoneSE and the huawei mate pro 20 , they have sold the huawei mate pro 20 , instead of the iphoneSE they say they have a system in place that if the wrong phone is sent they will send it back in my case the wrong phone was sent , and it did not get sent back to me , so i no longer have this phone and they still are trying to change me 700 pounds for something i dont own and something they have sold on without my permission , the original sale was for the iphone SE very clearly worth 35 pounds in a the picture i sent them , so they have sold on a phone i did not give them any authority to sell and now are refusing to believe thats the one i was selling and now are expecting me to pay 700 pounds which now is a sum total of 2 phones worth 1400 only one of which i have in my possession and they are trying to charge me for there mistake , i cannot pay this amount of money , they then said i had to confirm or deny this action and i did neither so without my permission has sold a phone worth 700 pounds and now charging me for it i do not have this phone in my possession i have sent it to them back they have said it got sent to the wrong department and in this case the phone i sent back was only 2 days old , and they are refusing to understand , will not take this off my bill and so i will be paying an extra 20 pounds a month for there mistake