Telkom Internet payment dispute

I have a Telkom internet line that has been down for more than a month. After numerous phone calls the still insist that I need to pay an enormous amount to re-activate my account. I have paid and paid every time I speak with them on the phone and still they need more money. Nobody can explain to me why my line is inactive and why I still have to pay hundreds of rand every week and still no change. My monthly installment is R699 and I have paid almost R3000 in the last month, and still my internet line is inactive.