Query not resolved

I opened a gold savings account when it was advertised \open a savings account for only R5.50 pm\" I opened the account over the telephone. I seldom use it, about 6 weeks ago I was charged R110 for an unpaid fnb debit order. I disputed this, but this was not resolved, even sent an email to the complaints department they did not respond. Nobody explained me the charges. So I stopped using that account. Now if this charge is not reversed I will close all my bank accounts with FNB. The account in question is ***. We also have a business account with FNB and I will move over to Standard Bank. The staff are very poorly trained and not skilled enough to handle this type of query"