I Received the same message, I tried to call them back and the mailbox was full! GOOD THING...lol! I also filed a complaint with the https://www.donotcall.gov/register/reg.aspx
Scum Bags!
text msg. offered to lower my mortgage. asked for permission to call me. i texted back that i was on the dnc list and would file a complaint if they did it again. no further contact so far.