Confirmed Account Closed Yet Still Debited

I went to FNB some time between June/July 2015 - beginning of August 2015 and told them that I am closing my account and want to pay my revolving loan manually including all my debit orders to be cancelled as my salary will no longer be going into the account. The consultant told it wont be a problem and it will be sorted. On the 25th of August two amounts went off on this apparently closed account. After alot of emails going back and forth from the 27th of August 2015 - 31st of August 2015 a confirmation mail was sent out stating my account was closed and card was cancelled, however 01st October 2015 the \Closed Account"was debited for my revolving loan which was already paid on the 25th of September 2015 manually at an ATM at the Trade Route Branch. At first I thought it must be a mistake but then I received a sms at 14:40 on the 05th of October 2015 stating my account is in arears.... This is really starting to affect my attendance at work cause I cannot continuously be running up and down to the banks and is also starting to become strenuous for me... And plus I cannot be sitting on my phone all the time as it will affect my performance at my job function as well..."""