Send him another message. Give'em time 'till end 
this year, or mid January. Then you'll know. 
Don't refund. They didn't ask, so they're still 
interested in going through with it - or NOT and 
go through the deal out of politeness. Meaning, 
you can reckon with the balance to come, SOONER 
OR LATER. But it does suck, yeah...

Anna