Bad Communication

I logged into my mobile banking today just to find out that FNB decided to deduct ebucks from my account due to them allocating too much ebucks in my account in September. I do understand that mistakes can be made and that they can deduct to correct their mistakes. But not to inform their customers that they will be making an adjustment due to some error in September, so that the customer has to call FNB just to find out why? I am really finding it ridicules that there is no Communication.

I would have appreciated it if I was at least notified of this with an explanation. instead of me having to call to find out.