I think mv is only move on remotesite.
I'm pretty sure that \\ess-raddon\e\phonecalls
is not a valid path.
Open the folder in the remote panel of WinSCP GUI and use the exact syntax you see on the top of the file panel.
My script
option batch abort
option confirm off
open connection
mv "*.*" \\\\ess-raddon\\e\\phonecalls\\\*\.\*
exit
fails and gives
Error moving file 'BUS4596555' to '\\ess-raddon\e\phonecalls\*.*'.
No such file or directory.
Error code: 2
Is it because i'm trying to move folds and not files?