Standard Bank ***** Case

My mother opened a ***** case on the 4th of May 2024. Her phone numbers got hacked and she went to change her cellphone banking numbers on the 22nd of April 2024. She has been using the account since then but to our surprise no transaction notifications were received on her phone, on the 3rd of May she requested a mini statement at the ATM and discovered that there was R8000 missing in her account. After checking a full statement, it reflected that the person who is currently using her old numbers made transactions in my mom's account. She opened a ***** case on the 4th of May and the consultant said they'll open and investigate a ***** case, since then it has not been resolved. It has been almost 2 months now, there is no update, we only received a call from them after my mother visited the branch to enquire 2 weeks ago but the call didn't really say much.