Nudebt and Telkom are ******.

After 3 years of paying my cellphone contract and insurance, I'm now being harassed by Nudebt about paying an amount I don't owe since stopping the Telkom contract over 5 months ago? I am rather disgusted at the manner in which both Telkom and Nudebt do their business. I've decided to open a case of ***** against Nudebt and Telkom for issuing wrongful debit orders when I've clearly checked with Telkom on multiple occasions that my account has no outstanding balances, yet Nudebt continues to contact me.