contract ended

(service number ***)<br> <br> I had a 24 months contract vodacom ,my contract ended february 2015, never even skipped a month of payments ,,but they still billing me for a contract which ended.I was not notified nor received any messages prior to the end of my contract,now they want me to pay for a contract that ended ,i didn't even use that airtime nor sim card.,and also a ********** upgrade was done on my account ,affidavits were sent for cancellation,credits were passed on the account ,and now i m being told that my account is outstanding,for what<br> contact -***<br>