Vodacom negligence and customer has to suffer

I received a invoice for a premature cancellation, a couple of days later in the same week I settled in invoice. I then proceeded to sell the phone to the market.

After settling the invoice after 72 hrs, I called asking for a settlement letter which I was told they would send. A couple of days after I receive an SMS which stated, "I forgot to include the device amount to the invoice of the premature cancellation so please expect an email with the amount for the device outstanding"

That's the crux of the story.

Point one: I asked the consultant when I received the 1st invoice without are the any other fees I should expect and she said no. I further probed and asked what happens to the phone and she said I keep it. Based on this, I sold my phone for a substantially lower amount that what the device is.

Point two: With me having sold the phone and getting another invoice later should not be my problem. It should be vodacom who deals with this matter internally for negligence on their behalf caused by their very own staff member. Let us not forget that should it have been the other way around (customer being negligent, there would be hell and accountability to pay for).

So now I want to apply for a new phone and this process is taking forever to sort out (almost two weeks now) and i keep getting calls from different people and departments. I need a new phone but I can't apply without this being sorted. I tweet almost every day and it's the same story, we will look into this.

How LONG DOES IT TAKE TO GO LISTEN TO THE RECORDING, ASSESS WHAT HAS BEEN SENT TO ME AND LOOK AT WHAT WAS PAID AND WHEN BEFORE THE SMS of "I DIDN'T NOT INCLUDE THE DEVICE HANDSET"

This is a pathetic service from a big corporate trying to squeeze some money out of me knowing very well they are in the wrong of decisions were made on their own negligence.

VODACOM I CALLING ON YOU TO HELP ME OUT HERE.