Has called family and now searching through my facebook for any possible known contacts, then looking through their facebook and if any information i.e their work and will call their work asking if they know that person and to contact them. Is this illegal?

someone who chases owed money. they are rude and contact your family

Caller who doesnt identify himself or gie any information. insists that he speaks to someone and they will find out the info once they speak with them.

Rude caller who refuses to identify what company he is calling from.

repeated calls on caller I.D.