***** department of Standard Bank not doing their job

Good day, I just want to complain about the experience that my mother in law had with her bank, there was a ***** case on her account where money was deposited in her account that did not belong to her, she informed the ***** department immediately, they said her account will only be temporarily blocked until the money will be removed from her account and when the person that was responsible will be caught, it has been almost 3 weeks, her account is still frozen, and all her debit orders can not be deducted, she has medical conditions and can not even buy her medication that is required. we have been phoning the ***** department multiple times and still nothing has been done about the situation.