Truist Bank (formerly BB&T Bank)

I had to open this estate account to resolve my deceased moms Financial obligations to the state of North Carolina. I did this while it was still BB&T which I bank with for almost 20 years. During this process I moved out of state. I was able to zero out the account and close it however a deposit was allowed to be completed via Zelle. I contacted customer service and informed them that I need to zero the account out in order to complete the closure of the estate process with the state. I was told to call the local bank which I did and was informed that they don't have any bankers there and will not have for two weeks. I was transferred to another bank in the same town however no answers the phone . I am completely frustrated as I do not understand why the bank would allow a deposit into a closed account.