Telkom Tribulations

I must now be nearly five months since we have had access to our Telkom pre paid line for more than three consecutive days. Now we have received an account for R192.27. <br> A call was made to Telkom (10210). At first they denied that we had a pre paid phone, but a normal line. No reason could be found for the charge. Eventually a lady called Zolina (supervisor?) came onto the line. I explained that I had paid R100 on 12th January 2016, but later, when service was , briefly resumed, this had been reduced to /- R35. Zolina said that he R100 was a short payment. She was unable to grasp the fact that we had not had use of the phone, neither could she explain what the charges were for, but merely that if I did not pay our service would be terminated.<br> Am I paying rental for a line which I have not been able to use?<br>