Got 3 calls with no message left.

They've called my home several times from this number and others, but I turned the machine off so I don't know if they would have left a message or not.  They called my husband at work about my debt, he told them not to call him at that number and hung up and they called right back.  They called my son who lives across the country from here on his CELLPHONE, no idea how they got that number.  They wanted him to give a message to my husband, not me.  They told him they had spoken to him but he was short with them. These guys must be real bottom feeders.

Got a call from this number, no message was left.  On the Caller ID it comes up as Greystone Alliance.  I have no idea who they are or what they do.

will call 10-20 times in a row, won't stop calling. Very rude, Greystone Alliance?  This type off incessant calling is illegal and against the fair debt collection practices act.

called my husband at work. how can we start a class action?