Worst customer service ever

Telkom recently deducted my money *****ulently,then I went to Telkom kiosk at the Groove Mall and opened a case,they promised to resolve the issue,I even received a case number, but today a debt collection company phoned me to say Telkom handed me over to them and they are even promising to blacklist me,I never had a contract with Telkom,I will like to let everyone stop supporting Telkom as they cannot be trusted.