Telkom service providers are not interested in providing customer service and complaint resolution

I have been with Telkom for a while now but for some reasons they are the worst at choosing Vendors. A while back they were using Finrite for insurance. This insurance company was the worst. No customer etiquette or professional service. At least they picked up their phone shem. Now, they are using Nu Debt, a debt collection service that harasses their customers even when they have paid any debt. Went as far as putting a tracing notice on my credit bureau profile when payment was made more than a month ago. I keep getting e-mails about payment being due, default judgement. They dont reply to email and they dont pick up the phone. Not sure what needs to happen but Telkom needs to use service providers that are actually interested in rendering a service. I really cannot wait for my contract to come to an end because I have had it.