Unauthorised upgrade

My mother went in to upgrade her cellphone contract together with my younger brothers yesterday. When they got to the menlyn branch they were told that my brothers contract was already upgraded to a sim only contract a year ago by the online department.<br> <br> We tried to call the online department but it was closed. My mother, who is the main contract holder did not sign for anything and could possibly not have made an online upgrade as she has no online facilities. My brother also cannot as he is not the main account holder. We would like to see proof of authorisation.<br> <br> Furthermore, my brother tried to upgrade to an Iphone 6 but was told he cannot do so because the phone is being phased out. But the phone is advertised as an option in the pamphlet.<br>