On a serious note, have you spoken with them on the phone and told them that bankruptcy is filed and they need to speak with your attorney if they have any other questions or concerns?
If they are calling you on your home phone maybe think about changing to an unlisted/unpublished number. If the calls are coming in through your cell phone then ignore it or have the number(s) blocked through your service provider.
Did your lender sell the loan while you were in the process of filing the chapter 7? Perhaps this new lender has not received the notification? You should ask your attorney to look into this for you.