Hiya
@seybinSince the device was purchased brand new, it is covered under Apple's warranty, not giffgaff's. Giffgaff's warranty only applies to pre-owned devices. You are covered under the manufacturer's warranty however. You should make an appointment at an apple store or schedule a phone replacement through the phone
Apple's technical support phone number is 0800 107 6285
Hopefully this helped; have a nice day-
shibolleth
