CHARGING ME AFTER SETTLING ACCOUNT

<p>I have been receiving calls from a Vodacom call center regarding my account. on the 18/11/2016 i called the call center asking for a settlement and they gave me an ampunt of R179.60 which had to be payed within 7 working days. On the 21/11/2016 i made the payment and called a few days later as per their request to have them cancel my contract. I recieveed an sms later that day with a refrecnce number confirming the cancelation. During the month of December just after the 25th i received a call from the call center saying i owe an amount of about R275 for the month of december i told them i cancelled the contract and they said theyl get back to me on that, They never did. Again in january i received a call and this time the amount had doubled... I called Vodacom and asked for a settlement which they provided, I made payment as per their stipulation( within 7 working days) i then called back after a few days to cancel my contract which they did. How is it that i owe them money for the months after the contract has been cancelled, Why werent i informed about such mediocre. EXACTLY WHAT IS A SETTLEMNT? i NEED THAT ACCOUNT CLOSED AND I NEED PROOF OF THE CLOSURE IMMEDIATLY. </p>