[wirlwind]

You can take their call to remain in honor, and simply tell them not to call you on the phone again- to keep all communication in writing-- but still don't answer any of their questions. Tell them to have a nice day and hang up. Once you have told them to keep all communications in writing, you don't have to answer anything. You haven't refused to communicate with them, you have simply stated the way you will communicate with them. I just can't resist aggravating them- they've aggravated me enough.