Cell c fibre

We've got an acount with cell c fibre. Our fibre was activated last year November and have been paying every month. 2 days ago they decided to switch off my fibre due to no payment. I asked them whats going on and the send me a bill off R3200 with the wrong account numberso i forwarded my account and bill so that they can resolve this issue. I keep sending emails but no response and every time i phone each peraon has a different excuse.