They just called me today & I called back they hang up and of course I sent a text saying who is and they wouldn't respond. My cell phone is a private number that only friends family church doctor's & agencies can call it. I can get it changed if they continue calling me, they just called me the second time now.
I use an App on my cell phone that is a FREE App called Phone Warrior. It will ask if you chose to receive a call or to Block it. It will even tell you if it is a known Spam #. It has saved me a lot of unwanted calls and wasted minutes!!! Been a blessing!