I've been having a number of problems with Ubuntu One and neither Canonical nor 7Digital have been able to help.
Firstly, months ago I placed an order and was charged double the actual price, $2 for each song.
Secondly, I ordered songs last night, about 12 hours ago, and they are still pending delivery despite the claim that purchased songs "Are magically delivered to your Ubuntu One cloud in an instant."
Does anyone know who else I could get in touch with? I want to support Ubuntu by purchasing my music from its store, but I can't continue to do so until this is resolved.