how do I omit my voicemail from the services comcast provides to my home?

Hi 

I was on the line for an hour and they could not diagnose the problem, which was a stutter dial tone. it escalated to the advanced tech support and they too were unable to remedy the problem. Then they sent a tech over , and he stated that a stutter dial tone was normal. After about 45 minutes I finally asked him if we should try calling and sure enough, xfinity put the voicemail feature back on my line w/o telling me. Crazy huh?

How do i remove the feature from my 1FR line ?