Impossible to communicate with the correct department.

I complained last week about a double deduction, case nr ***. I missed the call this morning from FNB. Trying to call back is a nightmare. You get sent from pillar to post and then just get cut off. I have emailed all the proof of a double deduction on my account yet no one seems eager to help. Tomorrow I will be going into a branch and won't leave till I have my money back. I will close my accounts shortly after that!