This is my 4th complaint regarding the same issue which is still not resolved

This is my 4th complaint regarding the same issue which is still not resolved. Vodacom please update my account balance. I currently owe R839 instead of R100. You promised to correct the account and I am still waiting. Contract Smart L line was canceled in August, however we are in October and it has still not been resolved. Also i provided you with the correct address for delivery of my sim card. And they still sent the courier to the incorrect address. Vodacom experience is like pulling out wisdom teeth. Very unpleasant. Please can someone who knows what they are doing assist me.