You could always answer back something similar to this Michele ... using their own format as a guideline:

"Dear [insert name of the not-so-dear one/s]

My husband and I are not interested in personally speaking with you. No offence meant.

It is our privilege to live our life the way we see fit, just as it is your right to live your life the way you see fit. If you choose to volunteer your time for your religion, then kudos to you. We are fully aware of what the bible says and do not need to ask you further questions.

Please ensure that we are added to your "Do Not Call List".

Thank you in advance for respecting our wishes and for not contacting us again.

[add your name if you wish]

"Thanks to God .... for making me an Atheist!"
Ricky Gervais
Golden Globe Awards - 2011