Lack of Transparency

I received an sms that I was due for an upgrade and I did exactly that on 28 Nov 15. To my surprise when I received my invoice it included a device fee for Nov and Dec plus a migration fee. A telkom agent explained that they would not include the migration fee but to my surprise, I received an sms that included the fee as well as an invoice for this month including the same fee again. I called and spoke to another agent who promised to escalate the matter. At 7pm last night I received a call from an agent who explained that the fee was not a migration fee but a fee for my previous device. I am so disappointed and feel like i'm being held ransom as no one explained any of these things to me when i went for an upgrade. Had I known that it would be this way I would not have upgraded and would have waited for my contract to end. Now i'm stuck for another 24 months with a service provider that did not provide the required service to keep me informed and that did not act in the best interest of the customer. I'm stuck paying for two devices due to the lack of transparency by Telkom and its employees. Ideally I would like to cancel my contract and return this device.