Absa - today you have money tomorrow you don't

Money was ****** from my mom's account in April. "Family assist" R3000 x 7 times. We reported it to Absa and they said we need a case number. We did all of this, send it through and received a email on the 24th of May, saying that Lar@*** will be our case manager. We have had NO feedback from Mrs L, nothing!! And now we are back to the steeling. They stole money out of my mom's account again. "FAMILY assist" again. After limits were changed. The only people that can change your limits apart from you are the bank employees. So is it acceptable to now take from your clients that trust you with their money?????