Vodacom cancelation ****

Canceled my contract after battling for them to cancel it. They deducted money that month end and i was told they would to close the contract so tell me why vodacom deducted my money second month after canceling and when I reversed it they ran to my credit score to claim unpaid debt. What debt is that for? Remove your account from my credit score. I lost 26 points cause of this. Why is canceling your contract such a hustle even after the contract has ended.