I EFFECTIVE AND EFFICIENTLY. CRAZY UNEXPLAINED FEES

I had a fee of R520 on my account which is called internet banking fee. From July when I opened the account, I have never seen such a ridiculous amount for a bank fee. I then went to Absa Viljoenskroon where I have been for 45 min with no valid explanation of why I was charged this amount.. Is it a fixed aount every three months.. Is it charges based on me clicking the app since for each transaction I make... I am charged. Can I please understand what's happening so that I am clear on how to do my banking beyyer next time to avoid such. I was told to leave and the branch manager will get back to me to see if charges were fair or not.. Fair how... All I want is a detail breakdown of those very new.. Very sudden fees. ABSA... TRANSPERANCY... DETAIL FOR ME TO UNDERSTAND... BE EFFECTIVE AND EFFICIENT.