FNB stoled my money

During the course of January 2015 me and my husband went overseas for our honeymoon. During that period over a R100000 was removed from my account. When I returned I found that money was removed this was mine and my husband savings. FNB then informed me that they have appointed forensic investigator Paul benson. He informed that they have recovered my money but I need to pay him R12000 to get it back. This is money I didn't have but had to pay the investigator. I then borrowed the money paid him as requested by the bank they promised me that 30 minutes after a EFT is done they with return all my money and reinburse me the money paid to the investigator. This was all lies after payment I continued calling the bank and they told me they processing payment and the money will be in my account. No money reflected. I called the next day and they informed due to a late payment which was the banks fault I need to pay them another r5000 to get my money where do they expect me to get this money as it is I took the bound money to pay them that R12000. No one at the bank wants to help an all my debits are going unpaid because I used the money to pay the investigator. Please someone help.