Standard bank staff members misung work resources for their own interests

I'm very disappointed with what's happening with my mother's account, it seemed there are people who are busy accessing my mother's account with her consent and we went to Alberton to lay a complaint but what hated me the most the guy who was attending to us quickly asked us to sit a bit further away and tried to call the alleged person to tip her off that's when we asked him to stop it cause he was calling the lady by the name Linah who works at Katlehong branch to tip her of our findings. Later he opened my mom's profile and we saw that 2 staff from Standard bank have accessed her account and she didn't know a thing about it. The guy who was helping at Alberton then started explaining a lot of things that never made sense, initially he said no one can access a client profile while the client is absent but when when saw that 3 staff from Standard bank just did while my mom was never been to the bank he started mumbling cause we wanted to know how come it was possible. This Standard bank staff cover each other when they are on the wrong, I'm truly hate and I dont know if my mother's account is safe or not. PLEASE I NEED PROPER ANSWER FROM SOMEONE ELSE WHO IS DETERMINED TO SAVE AND SATISFY US AS YOUR CUSTOMERS.