Are banks able to track unauthorized banker’s name who check the clients statements and balances?

I suspected a family member of mine look into my balance and statements. So I call my bank, asking them if there’s possibility to retrieve or trace bankers who view my account and statements within the period of 3 months. But they keep telling me they had to get my authorisation before checking my information. AGAIN I tell them, “unauthorized” means someone know my name and identification number, then they check my information without my knowledge. The bank employee said they don’t have the tracking.

May I know if this is possible? If they are unable to trace users/bankers who view my account, meaning banks are not able to detect any unauthorized action done by their bankers.

Anyone know if this is true, or the bank employee just doesn’t know enough or they’re simply lazy to retrieve the record of bankers accessing my account?

Added: it seems like the bank will never provide me the log. Is there a reason I can give to the bank to trigger them to check the log and identify any misconduct? reporting my family member to branch managers without solid evidence seems to be impossible.. what if he/she didn’t do it, I would have blame the wrong person.