LTE Cancel Contract ****

I am here again on Hello Peter because this is all that helps. I have been struggling to upgrade my LTE package to uncapped but no one could help me so because I was told that when migrating to the double package my end date for my contract would not change and that I was well past my 24 months so I just cancelled my contract and apply for uncapped. So I did just that and as I cancelled my contract I was told I do not have to pay anything because I did not receive a new device. Now I receive a bill charging me more than triple what I use to for cancellation fees. This is unacceptable from Telkom, I have not received one same response from the helpline every time its something else.