Hung up on me a few times that I answered.

never say anything or when i call back they answer then say nothing

This number calls and it rings 2 times and if it rings thru to my voicemail they never leave a message.  They call during my working hours when I am usually unable to answer the call.

This number called several times on my work number. Called it back- lady answered and said it is 'Fitzone advance' ????? told them to stop calling