Brand new iPhone 7 Plus not working

<p>Hi, I am writing this complaint because no one at your stores is willing to help me what so ever. I upgraded my Business contract about a month and a half ago. Two weeks after I got the new iPhone 7 Plus I noticed that my camera only works 50% of the times I tried to use it and for the last week I have been unable to use my camera at all. My microphone on the phone is also not working and making it impossible for me to sometimes even take phone calls. I use the camera for work and I am on this phone 24/7. I need help. And not help by replacing this phone with an old outdated phone because I am paying a LOT OF MONEY for this cell phone and I need its features!! Please get back to me asap with a solution!</p>