Handed over for an up to date account

I am looking forward to December when my contract finally expires. I had an outstanding amount of R1004 on my account which I vouldnt understand. Vodacom debited the amount from my account in July. I gave vodacom the beneifit of the doubt and did not query the amount. A few days later I get an apology sms to advise they made a mistake. Again, I did not query the mistake made. About two weeks ago, my services were suspended.. I phoned and they told me that I owe R1004! I explained that vodacom told me that it was a mistake...... To avoid issues I told them I would pay by 6th September. I paid the full amount due plus my due amount for August which was over R1500. They reactivated my services on the same day I paid (Way before the 6th) Now I get an sms to say I've been handed over. I comtacted the callcentre, explained the issue and she says, youve been handed over and offered me the number to call. When I said... You are not listening to me... I have paid!! She put me on hold. I waited and waited.. Have to get back to work so had to end the call... Im so disappointed. I dont have the energy for this....