Very bad service

I have been trying to cancel my contract and getting my name cleared from ITC listing from flexi club for over 6 months now. I call the call centre everyday and my issue is still not resolved, Joining flexi club counts as a huge loss for me because I paid R13 800 upon joining and they still debited monthly payments and no one is able to help when I needed the service, I ended up cancelling the debit orders from my bank and then they listed me on ITC negetively affect my financial status and not being able to get financial service providers to grant me credit, I have been calling the call centre and sending emails since February and stilll I have not been help. The service is really terrible