Predatory sms

On Friday afternoon I got an sms from Credtworx to say that my \Bonitas acc has been handed over for collection\". I haven't been a member of Bonitas since 2013 and have never received any notification from Bonitas about an outstanding account. Phoned Bonitas this morning and confirmed that I do not owe them anything - ***. How can Creditworx threaten me to make \"payment within 48hrs\" when, according to Bonitas, I do not owe them anything? Is this a ****? Should I report creditworx to the authorities?"