Thinks it is OK to just take money

I recently settled my account with Vodacom that was handed over, On 11 November I receive a statement showing a total due amount of -R2844.92.

After battling for 2 days to get through to the legal department the advise me that they will "simply remove" the amount outstanding. That is not how it works, you did not simply remove the balance I owed you so how do you expect me to accept that you will just make money owed to me "disappear"

I expect Vodacom to reimburse any and all monies, (i.e. R2844.92) owed to me