I have been searching for Ben's feedback thread, but I have not found it so far, but suffice to say that you are not the first he has done this to, 'been away on business', 'left it at the office' et al are all familiar to me. All I can say is that to my knowledge he has always sent or repaid EVENTUALLY :!: :!: My advice is just keep hounding him until you get an outcome. I know this is probably not what you want to hear but like I say I know this has happened before, also ignore his petty attitude and rise above it :!: :!:
Good luck
Mark