No Clue on Who is Handling my Overdue Account

I have an account that is in arrears and i got a call from some Attorney collecting on behalf of Edgars requesting that i make an arrangement to pay up the debt. i gladly arranged with him to debit 200 rands from my account every month but at the time of the call i was very busy and could not write down the caller's details but i asked him to sms me all the information after the call but that never happened. the debit order has gone through 4 times now and i called Edgars to trace this debt collector and i was given a number( ***) to call LIMBO and i was told those were the people handling my account, i called the number only to be told that they do not have my account and they have none of my details on their system which means they are not handling my account. Am i being duped of 200 rands every month ? can i cancel the debit order?. i wish to get some feedback from Edgars soonest.