Cant even understand and complete a simple instruction.

Why is it so difficult for SB to follow a simple request and close an account when they get notified to do so? Almost 3 years after I instructed SB to close our business account, I find that it is still open, with no communication from SB at all. The cards etc were all handed back and destroyed in my presence. Now, someone has paid funds into this account and I cannot retrieve them as I have no access to this account. They will not automatically reverse either because the account is apparently still open. I am not going back into a bank again. I did that when I went to close this account. I want the deposit returned to the original depositor and written confirmation that this account is for once and all closed permanently. I also find it strange that there was a new business banker every few months when we did have the account open - no wonder nothing got done.