Savings pocket disappeared and money is missing

Last week i noticed my savings pocket disappeared and i called in to the call centre, was advised it was closed to inactivity and the balance should have been transferred in to my main account. The consultant even checked herself and said there was no money deposited in my account after the account closure! Now i have to go in to the bank to find out where my money is gone, how can FNB make decisions to close accounts without informing their clients?!