called cell phone

They have called my cell phone 19 times and counting. I called back and left a message for them not to call anymore, and it seems that the calls have picked up since then. I don't know what, if anything, can be done about this - but this is ridiculous. There is no reason that they should keep calling this many times.

When i answer the calls all i get is a beep like its trying to fax me something. I called the # back and outgoing message says that if you are receiving fax/calls from that # to leave your # and apologized for the inconvenience... anyone know what this is about yet??

calls keep coming in as though they are trying to fax

They keep trying to fax to my phone line.  I've called back to have the calls stopped, but they haven't over the past 2 and a half days.