Hi
It sounds like you may need to use the VC codes to delete all the recordings. I have had it the past where voicemails weren't being delivered or being delivered to other users.
Log on via brandy or jannie, type vc u to delete user greetings, vc s to delete system greetings and vc a to delete all.
Ok, Press Trans *#..... TRANS/PGM..... the transfer key?.......sigh!