Horrible experience with jet Edcon group

A very horrible experience with jet ?? 2015 I've settled my debts with jet as i was paying for 3 cellphone insurances of which I had 1. My debts could not be reduced went into jet middelburg to discuss the matter no help I've received then I shut down my account with them. Currently I am receiving trrad massages that I'm owing them I'm being handed to debts regulatory and I don't have account with them, it is affecting my credit score