Logging tickets and nothing gets done

so eventually you get my line working but now i am being double billed for the data portion when i told telkom (i went in store at Mall@Redds) that i have my own data. Now all they keep doing is logging tickets but nothing gets resolved. Now my bill is through the roof and i have to wait for disputes and no one can resolve my query on the spot. I was told i have to wait for the next billing. When i do i see i am billed again? why cant this just be reversed?