Handed over account

Am aware that my account has been handed over and the debt review has been cancelled which is something i totally understand. This lady phones me from *** a company where my account has been handed over to demanding my banking details. ok at first she asked me to agree to a debit order for R800.00 of which i did and now she wants me to give her my banking details. I then said to her since my account has been handed over to you surely you must have my account details, call out the account number that you have and i will confirm if is the right/active one or not she refused and said she following protocol. How sure i am that this is legit? where is my safety in all this? Capitec i know i owe you but please dnt treat me like a fool here. You always send us emails and sms's not to give out our personal information to anyone and now this??