So I am going to be returning two phones tonight My 6S+ is a change of mind, I find it too big. My 6S has a slight problem with the screen, the top left back-light is darker than rest of phone. Will they be all awkward with the 6S+ Refunded and 6S Exchanged? I'm concerned they will get up tight about the 6S and try persuade me to go apple care route or tell me there is nothing wrong with the screen. Both within 7 days of purchase.