Pretty poor Vodacom

Took out a cellphone contract for my retired mother. After a few years decided to cancel the contract and put her on prepaid. Called Vodacom and spent a very frustrating 30 minutes cancelling the contract and debit order. The operator had obviously been trained and incentivised to convince anyone wanting to cancel to look at other contract options. I eventually had to be very blunt and a bit rude before the operator agreed to cancel the contract. That was November 2017. Today I get a call from Hammond Pole saying that there is still an outstanding amount and that i have 3 days to pay it. I have never received any notification from Vodacom that there was still an amount outstanding? Several hours later and i am still waiting for Hammond Pole's email or sms. If this is how Vodacom does business I will move my personal cellphone across to MTN and sell all my Vodacom shares. Totally unprofessional in my opinion.