Creditworx chasing ghosts and harassing me.

Creditworx keep on phoning me relentlessly about outstanding debt of R519.39 to Bonitas Medical Aid. This amount was paid to Bonitas 10 July 2018 and I have zero amount due to Bonitas as confirmed by Bonitas again today. I obtained reference number 140119Q6799AL from Bonitas today, 14 January 2019 confirming zero amount outstanding.

Creditworx insist that they will keep calling me until Bonitas remove me from Creditworx list.

Bonitas insist that I am not on their outstanding list and Creditworx should should pick it up and remove me from their list.