LG-SA won't take responsibility for my LG phone

I have a Nexus 5, made by LG. It stopped working during an update cycle. <br> <br> It is still under warranty. But because I bought it overseas, LG in SA says it is not their problem, and wants me to send it to LG overseas. I don't expect them to work with a phone they don't know, but why can't they coordinate with LG themselves? They ARE LG. LG phone, LG in SA, LG warranty, what's the problem? <br> <br> Send it somewhere it can be repaired, and send me a replacement phone.