Unauthorized debit order personal loan early debit??

<p>On the 15th of december i recieved my bonus and the 16th my personal loan was deducted - the loan clearly states that it will be debited on the 26th of every month - I then log on to fnb online and check my personal loan and it says that the payment date is the 26th of this month - so i will be paying the loan twice this month??</p>