Dissatisfied Customer

I Have this Vodacom account that reflects on my credit profile (Balance +R800) This has a negative impact on my score. I had a Vodacom contract when I first started employment that is about 16 years ago. The 24 month contract ended and was paid up. I have never taken another Vodacom contract after this. It shows on the report that the account was opened in 2013 ,No one has called or SMSed me regarding this account that is showing such a bad reflection on my credit score, is this how Vodacom treats their customers?. I need this to be removed from my profile urgently.