Sent my LG G4 in for repair after my motherboard f...

Sent my LG G4 in for repair after my motherboard fried (the phone wasn't even a year old). First, they didn't let me drop off the phone, it had to be shipped. When I finally shipped the phone they took over a week to look at it. Instead of "repairing" the device they sent me back a different phone which was LOCKED. I sent in an unlocked phone which I paid to get done!!!!! I've been trying to contact them but no response! Worst service and super unprofessional.