BMO Harris Bank Account Or Service Complaint

BMO Harris Bank account or service department,

Savings account Account opening, closing, or management Illinois

When I was - I got my first part time job and put all of my money into a savings account in my name. It went untouched for several years and when i was about - or - I went to retrieve my money, excited to see how much interest had accumulated, only to be told my account was closed due to inactivity, and the money was no longer there. I asked the teller where my money went and she claimed that there was no record of money being in my account although I showed her my bank book with the date of deposit and the balance. Being young and naive I let the situation go thinking there was no way to solve this problem. Since then the bank has closed. I have checked at www.unclaimed.gov and www.missingmoney.com with no luck. There has to be some kind of record left stating where my money went, or if someone took the money.