fido voicemail problem

Ok this is driving me crazy, I havent had a cell phone for that long but how do u listen to voicemail everytime i get a message i try listening to it but it says either nothing or my voicemail is full. But i got no clue how to listen to voicemail and i dono how it can be full, So where do i check in the phone for voicemail and how to delete it because sometimes with no reception people dont call back and i need to call them
plz help

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› See More: fido voicemail problem

well i tried listening to voicemail but it says thers no more room to record messages what am i supposed to do?