Deathly silence on unknown charges

FNB remains deathly silent on unknown charges on my bank account. Despite multiple mails and calls tot he call centre no one can provide clarity. It's no wonder SA's banking system is under so much scrutiny - FNB can't even clarify deductions off the customers' accounts, and refuses to give the matter any attention when asked. For the past 12 days I've been told it will be attended to. But this seems to be a very well versed tool to make customers feel like they are heard when they are actually being ignored.