VODACOM - Stuck with my cancelled contract and no assistance received

I have been stick with a vodacom contract for over 2 years now. The contract was upgraded and I never received a sim card. After numerous failed attempts I finally got a sim card after 16 months.

No the problem is that the contract was scheduled to end in July and I gave my 30 days notice. Since then I have spent hours on numerous calls trying to cancel this contract as I still receive invoices and statements. I am also now listed as a bad debtor and this effects my profile with FNB. I have asked for the recordings all the way from July as this is my legal right. No person ever calls to discuss this matter but they are quick to call and discuss the outstanding amounts. I have also called the cancellations department and have since received about 3 different end dates for my contract. How bad is the systems at Vodacom that they cant event get the legality right.... PLEASE can anyone assist me with getting this contract out of my life.