Terrible service

While being a member of one plan health insurance their call centre agents as well as billing department had no idea what they were doing.Every time i called in a consultant would tell me a different story.i was fed up.i canceled my policy as they way requested it to be done.i confirmed that their is no outstanding money owed to them by a consultan***** now atleast 7-8 months later and i recieved an email from nu debt that i have been handed over for 495-00 outstanding to One plan.what a joke.I would like to take this further