Our accounts and personal information are not safe with telkom

Good day, I am really sick and tired of being taken from pillar to post by your call center. I have an LTE 10gb contract with telkom, which costs R203.69 per month. My account was debited with R775.82 this month and your accounts department's explanation is that 2 mobile contracts were added to my profile in August. Please can Telkom explain how this happened? How possible is it that 2 contracts were opened under my name and added to my profile without my knowledge or authorisation?? No notification, no verification from Telkom?? We trust you with our data and personal information and this is what your so called "secured system" allows?? On top of that I must be the one inconvenienced by running around getting affidavits and certified id copies for your mistake and ignorance??? Please attend to this as a matter of urgency!!!