FNB Bank and money missing in our accounts!!

I bought a car in December and on the 28th Dec noticed money missing from my account. Me and my partner went to FNB and the consultant tried resolving my issue but advised that they were unable to trace the money even though they can see that there is money missing. She then made me call the call centre and they too struggled to trace the money so they escalated the matter and provided me with a case number. I followed up after 10 working days as i was advised and only got a response from them on the 21st Jan. I then provided my own evidence which i got from the bank in Dec since their email advised of "pending transactions" and the bank had actually showed me those and they didnt even amount to R1000. The bank has since ignored all my emails since then and i don't know what to do anymore as it seems like they are just keeping quiet with my money.

The funny part is that the consultant at the call centre advised me that i wasn't the 1st to call re money missing in my bank account, she had received numerous calls on that day. I have been calling FNB with no luck in getting assistance which is why i have resorted to Hello Peter.