Debt Administration *******ion

We paid louis van zyl attorneys as our debt administrator for longer than 5 years now and not even a cent was paid to our debtors and we took it apon ourselves to stop this admin and start paying our debt we even got a letter from court stating that we cancelled them but guess what? they still take money from us and they seem to refuse to refund it back we have requested our money back but they said the matter is with their finance department .Please anybody who knows how to stop this people please help