***** on my account

I just went through my monthly statement and realized that FNB debits my account with R10 every second day and with R60 on the last day of the month stating #payment bundle fee.

I have contacted their call centre and was sent from pillar to post, one department to the other until one agent hung up on me. Who authorised this debit? What is the payment for? Not only I demand an explanation but I want my money reimbursed fully. FNB ***** department should run investigations and protect their clients from such exposure. Who should be held accountable for this ****?