The worst service provider on planet earth. Disgusting Telkom

I need some help and attention from Telkom. I took a contract with this company and I regret it so bad! I never missed your payments . My contract with you ended 6 months ago but you still billing my account runing random amount debit orders on unspecified dates.. How can or do I owe you if I don't have a contract with you? Please stop this it's messing with my banking and history I need someone cancel this nonsense