Xfinity Voice Web Does Not Allow Access to Voicemails

Recently, we received notification that our voicemail box was almost full.  I logged on to the Xfinity Voice Website, only to get the message, "Voicemail is not enabled for this number. For assistance enabling your voicemail, please call 1-800-XFINITY."  So I called.  The first representative said he would check into it.  I asked him to call me back (didn't want to wait on the phone another 30 minutes or so).  After a couple days and no call, and still receiving the message on the Xfinity Voice Website, I called again.  This time I was transferred to someone in the voicemail area, and they informed me that this was a problem with Xfinity software and that they were working on it.  It's been at least a week, and I am still getting this message.  I could call *99 on my phone and delete voicemails that way, but that's very clunky - furthermore, I can't download messages from there.  Would appreciate this issue being fixed...soon.  Thank you.