Also received email claiming to be Synter Resource...

Also received email claiming to be Synter Resources. A debt collector for a UPS account. I have never had an account with UPS or any shipping company. Scam alert.
Edit: I was reading responses from company on other 1 star reviews. Sad. The company is either being hacked and/or cloned by scammers. But instead of helping those of us getting threatening emails they are chastising the victims. It is not my responsibility to call and resolve your issue.