No busy signal - just mailbox access instructions

I converted to Verizon and asked them to disable the Verizon voice mail so I could use my own answering machine.  That works fine.  However, when someone calls and I am on the phone, rather than getting a busy signal, the caller is prompted to enter a mailbox code for access to messages.  Can this be changed back to a busy signal via a code, or do I call Verizon customer service?

Re: No busy signal - just mailbox access instructions
Enthusiast - Level 3

Check w cust srvc first 800-verizon make sure the VM was absolutely Removed.

if it was , ask to go to repair (800-483-1000)  bc its still prompting as if it is a VM on the acct.

 They'll be able to put in a trouble ticket and have it removed!

hope this helps