Non-Authenticated Early Debit Order (NAEDO)

Oh my Word. Nedbank does it again but this time they are allowing an unauthenticated early debit order from a company NAEDO that i have never heard of or never contacted or had them contact me. Who is NAEDO and why are they deducting money from my account. More importantly, is my details not supposed to be private and not given to anyone? I just received a message now saying that R350.00 has been deducted from my account from a NAEDO. I googled them and came across numerous complaints to Nedbank with regards to the same thing. I now feel unsafe with Nedbank and this is the third incident I am experiencing with them. Think it is time to make a move ASAP. How can a bank allow something like this or even distribute your details or allow for it to happen. I can guarantee that the move will be done today. What will they then allow next. Shocking.