Account Cancelled,Bills keep coming

I submitted my cancellation request of my ADSL line on Feb 6th 2016.I didn't get a bill for the month of Feb .But now I got a bill for 2 months (February and March) including a late payment fee for February.This is ridiculous.<br> I was told by the customer care agent (at Telkom bayside mall, TableView) that I will be getting a bill only for the period of February after deducting the initial deposit of 700R that I paid.<br>