Protect Yourself from Edgars

In March I went to the Sandton City store with the intention to close my account. They dialed the call centre and gave my the phone. I was was then informed I could freeze my account until I was ready to start using the account again and I would need my ID to reactivate account for use. In June I was then surprised to get a message about my overdue account and I should make a immediate payment. Apparently I have an airtime subscription with RMCS (a third party) and told my I should call them. Which I never agreed and the Edgars call centre keeps saying the will investigate and today I received a final notice. I should have closed the account before it costed mule R1000 in airtime since June. Everytime time I call back there is no feedback, just a supervisor who is unavailable. I really should have Closed the account and I should have made sure that they would not share my details