West Asset Management Company hounding me for deceased mother's dabt Internet

As Mom died without a will, we've had to probate the estate. I'm the one in charge, and have everything in my power to settle all her debts and sell the property. However, the economic downturn has made that nearly impossible. 

There are several things wrong this with the line of thought: 

1) It is not my debt, and I am under NO obligation to pay it. The court has ordered me to sell the property, to settle this debt. I informed Cade I knew of my consumer rights in regards to credit and loans, and he backed off that refrain. 

2) I'm offering them a settlement just $3,000.00 less than what they proposed to me. Cade tried to tell me there was now far more owing than I thought, to which I replied I'd not seen it in writing, and until I do, I was going on the information in their last correspondence to me. 

Cade apparently didn't take too kindly to me knowing my rights, so he chose to phone me at odd hours, demanding to know why I was selling for a low price, why didn't I hang on another few years, and when was I going to pay them off. The process of probating hasn't been easy by any means, and the stress has left me with a heart ailment. When he woke me up on a day when I was feeling quite ill, I let him know in no uncertain terms that any and all correspondence is to be solely via my attorney. 

I've not heard from WAM since then, and neither has my attorney. However, I'm sure they're lurking about, trying to figure out what to do next.