Simply state, she no longer lives her, we are no longer married should you continue to attempt to reach her at this number I will file a complaint with the FTC (or whatever organization regulates whatever type of debt it is). Ask for the name of the person who's calling as well as address and contact information. Morelikely than not, they are just using skiptrace info under her name when married to you and tracking it back to you.
As long as nothing is showing on your reports, you should be fine. Just keep an eye out to be sure that you don't wind up in any debt you didn't initiate.