how do i see or listen to my voicemail online

this feature is CONSTANTLY broken.  And have complained to t-mobile MANY times about it.  In past they've "eventually" fixed it.   A couple of weeks ago, I tried to access my voicemail exactly in the manner given (click on phone and get voicemail).  Nothing showed even though I knew had voicemail.  Contacted support AGAIN, put in a ticket.  Nothing got fixed.  Today I click on same thing and is broken even worse.  Click on voicemail button and get page saying can't resolve page.

Apparently t-mobile does not care about people who use this feature.  Even the support guy tried to give me ways to retrieve to voicemail when not at phone.  Gave me phone numbers but didn't work for t-mobile prepaid and don't think any were even 800 like numbers.   I finally had to hunt around on my own to find a solution.    But when at a place that you have to pay for a long distance call (i'm at a hotel right now), I cannot get my voicemail without having the phone in any easy way.

thumbs down to t-mobile on this one.