Note 4 is having issues

Hi I just bought a Note 4 910G. I have rooted it with CF auto root, no issues. The problem started when I tried to install custom recovery. I tried flashing TWRP from ODIN and had no luck with the error surrounding NAND write. From what I have read this is pretty bad. I can boot into the phone where I have touchwiz, I can unlock the phone access settings but I can't use the home button to access home screen, when I do acees it from unlock It is just a black screen. Please help as this is an expensive brand new phone. Can I send into Samsung for repair.
Thanks
Sam