HELP!! Does anyone know Nathan Markley ?

[Dj4play]

I have a gtpro customer Nathan markley that has spent alot of money on parts with us. He has paid for half of them and ive been trying to get ahold of him for months to get at least what he has paid shipped out to him. I have an address on file and a phone number. the phone number works, but goes directly to voicemail. I do not want to ship out all his stuff to an adress i cannot varify with him. If anyone has information or can reach this person please let me know.