Continually bothering clients and they want it stopped. Does anyone know these people?

21 calls in 4 hours.  Who the hell is this.  I called my phone co to block number and they still get throuh.  How do I stop them??????

I am receiving calls from this number every 5 minutes...It sounds as if it is a fax machine.

I am receiving numerous calls from these numbers between 11pm and 2am, then random times during the day. It is obviously a fax, and I cannot find any information to indicate who it is coming from besides that it is in Dallas. It has been happening for a couple of weeks now. If anyone has information please post. Thanks!

My mother is receiving this same fax machine.  Why are they faxing us and how can we stop it.

Thanks!!!