Funds not returned

I am a student. I was ****med on the 25th of April 2022 at school. The bank was FNB. I opened a case with FNB and I opened a case at the police station where the incident occurred. I have case numbers from both FNB and the police. On May 2022, I received some of my money back because the ******** used it to buy an iPhone. FNB stated that they need proof of Sim swap from my service provider for them to return the rest of the funds. I lodged a Digital Banking Complaint with the bank and got a reference number from it, however to this day, they have not communicated with me like they promised. I have went to the head office of my service provider and did all they asked me to do. I have been returning to FNB ever since the incident to find out what can I do to get my money but FNB consultants keep transferring me and end up dropping my calls. Please assist with this matter urgently because I have been busy with this case for almost 9 months.