I'm sorry you are going through this. This is a perfect example of why people should not call unknown numbers back. You never know who is really going to be at the other end.
In the past telemaggoters used spoofing in order to display out of service numbers, however there has been a huge increase in those that display numbers that belong to innocent people.
Your one of the reasons why we don't encourage people to call back numbers since they are creating yet another victim of the spoofing! I've added this to my notepad so I can use it for teaching purposes here. thank you for coming foreword with this!