I brought a refurbished Iphone 6s plus from Quick ...

I brought a refurbished Iphone 6s plus from Quick mobile fix - the phone was delivered promptly and looked immaculate. Unfortunately within a week it was "freezing" and i parked it in the "messy draw". that was 9 months ago and last week I took it into the Iphone store in regents street to see if a software upgrade would fix it. they took the serial number off the back, then opened it and checked other numbers on the inside of the phone and confirmed that the phone was A FAKE - it does not exist on their records and secondly trim around the camera gave it away to them. I have messaged Quick Mobile Fix last week and await their response