The previous tenant in this house owes a great deal of money and collection companies are calling our house because( this was her last known residence) this woman used to live here, also mail continues to arrive and I give it back to the postman. How can I stop the harassing calls? I have tried to give these companies info that I have, but they don't want the info. Help!

Get their mailing address write them and tell them not to contact you further on this.