Bridging of contract

Vodacom is really a terrible company, which they have a terrible service. I'm sick and tired of Vodacom, they can't ever tell me why I am still paying for? I have two problems with Vodacom, firstly I have a previous account with them, which I had a problem with them regarding the bridging of contract. I had to pay them close the account, then months later they tell me I still have an outstanding amount that I need to pay, which from my experience I never seen anything like this. My contract was only 24 months only. Vodacom really is bad for business, they don't ever respect their customers. I'm totally frustrated and angry at this point. I going to take legal action against the Vodacom for bridging of contract. This is my final warning to all customers, beware of Vodacom.