Disgraceful service/Staff dont know how to do their job

I had requested to cancel my contract with Vodacom about 5mths ago and they did process the cancelation properly. I had 2 numbers with them. They cancelled one and not the other.I then started to receive bills for outstanding amounts with I called in again cause the cancellation wasn't done.I then had to pay in about +-R400 and they said they don't know why it hasn't been cancelled and will have to investigate.To date this still hasn't been sorted out.Vodacom CATCH a wakeup damit.Im not prepared to pay any money case of someone who doesn't do their job properly. I expect a call back now to get this sorted out and have nothing to do with Vodacom who is trying to ***** my money. Spoke to Lebongane Zanzeka who refused to help me as said she cant do anything.