not willing to cancel full team contract

Good day my name is Stewart My account at MTN came to an end on the 8th of January 2015 .<br> I phoned customer care a couple of days before the end of my contract, and asked how I can cancel the contract as I no longer wanted to be an MTN client due to poor customer care. <br> They advised me to phone on the day of the end of the contract and ask to make it a pay as you go si that you do not loose your number.<br> on the day of cancellation I phoned and canceled my contract. <br> In my ignorance I did not file the reference number away.<br> In May I realised I was still getting billed. <br> I then went into the zevenwagcht MTN office and spoke to Nadine who was very accommodating but could not help with the months that had passed due to no ref number. Which I understood completely.<br> However she resubmitted the cancellation for me.<br> In June I was charged again, I went into the office and spoke to Nadine again and she resubmitted it and was very apologetic. However at the end of July I was billed again.<br> I find this totally unacceptable, Please help. Thank you<br> regards Stewart