Line disconnected WHY????

I relocated to Pta and trsf my line pd for it to be trsf in March and after a struggle got my line installed When I wanted to use my phone again it had a voice message that I need to load airtime of R66+ (R67) before 16 or 18 May, I can't remember the exact date given. On 5 May I recharged the line with R100.00 and I was left with R33.00 something as per the voice message. I had received an incoming call on 12/05/15 still and no message on the phone. On Monday 18/05/15 I was not able to use my landline. I was said that my services had been disconnected. I called Telkom on 19/05 to query and what BAD SERVICE, tried getting to speak to someone from 8.00am to 3.20pm. Trsf from one dept to the next. I finally spoke to Julia Majeksane and she said that my line was supposed to be paid at the end of March and checked the sms, I said it was not an sms but voice message I got, she said she knows what she was talking about icw the sms as she works with it. Didn't like her tone of voice! I want to know when I asked for the line to be trsf why was I not told that there is an amount o/s. Why could I reload airtime and the message said I have R33 avail and now im disconnected. NOT HAPPY AT ALL!!