Sabbo - we can't post backdoor password in the public forum, and there is no IM available on this site.
If you google me, you will find my website, which has contact information for me.
Confirm that the voicemail card is Merlin Messaging, and not 007 Merlin Mail (yeah I know, but I've seen Magix processors in Legend cabinets). If you contact me and can verify who you are, and that you have authority, as well as a phone number that I can call to access your system, I can reset the password for you remotely.