Demand Deposit collected from FNB Easy Account

I've noticed that a "demand deposit" of R186.90 has been collected from my FNB Easy Account. The name of the collector is suspiciously "***" and the reference number is "***" as well. This is obviously a ********** transaction and I need it reversed and BLOCKED from happening again. FNB needs to urgently jump into action and resolve this suspicious transaction BEFORE I suffer a really serious loss.