They upgraded a contract without concent

Last year 2015 while at hospital with my son doing chemo, Nadia from the online department called to advise my data contract was due for an upgrade I told her to leave all as is I do not want to upgrade I am thinking of canceling..on the ***6 when I called to cancel I was advised this contract was upgraded and can only now be cancelled in 2017...I called Amanda the manager and she advised she will sort it out and get the recording, to date after countless calls and messages left I have not been assisted. All I get is Nadia will call me back but doesn't, surely this should be a managers duty to sort out, this is dishonesty of staff and lack of interest of managers to do their jobs. Make promises to revert back and do nothing. ***6 called and spoke to Melanisa she was to give a message to Amanda with all my details..still nothing. I want this cancelled I did not request it and you taking money for services not requested is illigall. I'm so angry we trust you people and you take us for a ride. Also have a second number I was advised is a prepaid also to find out same day it was activated as a R110 top up, I've lost money on this line as they have taken off what I did not use.