Cancellation of a Contract

I Have called the call center requesting that my contract to be cancelled, i ask about a week ago, i haven't received any response yet. i have received the worst service ever from you guys, i have to wait more than a week to get the settlement value only, a thing that can be done in less than 10 minutes. I just received an email about 10 minutes ago from Danny Botha asking me for my Device details, You guys should have those details on your system, and why wait for a week to ask me the device details. Really its phethatic