Cancellation of Account

I gave notice to cancel my 2gb Data Contract ***)on 26th February 2015. However MTN continues to bill me. As this contract was linked to my cell phone, I received a sms on 15/05 stating that my line will be suspended in two days. After suspension I went into MTN Bedford Centre on 19/05. They re-cancelled the data contract, contacted the call centre and the call centre agent ensured me that the contract is cancelled and the amount of R119 outstanding has been voided. However, I received ANOTHER sms on 1/06 to inform me that the money is overdue and suspension of my cell line will take place.<br> I refuse to pay the R119 as I cancelled the contract in February and billing should have stopped then.<br> I am SO FRUSTRATED with inadequate service providers and absolutely FED-UP with MTN.