I logged a billing dispute, it was closed without providing me with proper feedback (the issue is not resolved)

I logged a billing issue with telkom, I constantly following up with them (because there was not feedback from them) and i was told that the ticket was closed because their back office concluded that I was charged accordingly, which by the way is feedback I never received until I called them again.

Nobody from their back office had an ounce of respect for their customers to call me back or send me an email explaining how they came to that conclusion and to prove to me that they charged me accordingly, I can definitely prove that I'm being charged for services i did not use.