Contract Expire

I took an Iphone 6 white on the 08/04/2013 with Nashua Mobile billing me R399.On the 16 December 2014 I sent an email to MTN enquiring when my contract is ending coz Nashua Mobile was bought by MTN. I received reply from Ighshaan Adakarie who advised that my contract ends 2015/04/10 I confirmed wethernit was my last debit date I was than rep**** by Mikhail Bar mania advising that I need 30 days notice to cancel my account. I then enquired on the 10 if march for a double deduction so that my account will be settled and paid up by end of march. No feedback given I then called after 25/03/15 when I wasdebited R458 and not R399 for requesting extra bundles which I had never requested. Why would I request extra bundles when I just requested to settle my account.<br> <br> I then enquired for 2 months for my refund speaking from one consultant to then other giving different stories until I spoke to Melisa Van Jaarsveld who advise that I should use all my benefits before cancellation. And no notice for cancellation is required for migrating to prepaid on a condition that my contract has expired which expired on the 10/04/15. Why am I forced to pay when contract ended already