I sent him a PM regarding this on 31st August and I didn't get an answer yet. So, Let's discuss it publicly.
I don't really know why some users ignore PMs relating to accusation, but later on when things are getting serious you see them show up with some excuses/reasons/defense.
A simple PM reply stating that the address they send btc to is an exchange or a corporative address (if something of that exist), would have solved this problem. Now, you have made it public, I believe he will have to reply. Maybe he is waiting to see the forum reactions first before he will clear the air.
This type of inquisition is the lowliest approach to merit farming.