Stop fukin callin me it's annoyin as hell

This number calls 2 to 3 times a day , starting around 8 - 9:00 am. Have a 81 year old person living in house hold.
These calls are  disturbing  now.  My patience is wearing very thin, as I take care of this person. There should be a way to put a STOP to this kind of annoyance. Talk to some woman once a week ago, she's was hawking about  some Cancer fund (yea right). Received a call today 09/ Feb/ 2015 at 9:00 am . How do these people get our numbers. ???

Received call left no msg, I called back to see who it was, when a guy answered I remained silent to hear background and was hearing other voices.  I assume it was telemarketers.  The guy called my name, I ended call. Also in the past I ordered diet pills but, I discontinued the order because it didn't feel right to me

I called them back because they call twice a day at the exact same time, so I knew they must be aggressive telemarketers. They answered and knew my name and said they were The Health and Wellness Center- generic name.  Said I recently expressed interest in a weight loss pill online, which I don't recall. I told them to stop calling and remove my number. I then blocked their number.
But now they continue to call as Unknown Caller, so I can't call back.  So I unblocked the previous number, told them to stop calling. They said it takes 10 to 12 days to get my number removed, and I hung up.
Really bad company.

They called and when I answered an auto voice said 303 and hung up