TD Bank missing money middletown ny

This problem started on June 28, 2018 when I went to make a money deposit as well as a withdrawal  from the bank. My wife and I went to the cashier at the from desk, and a lady by the name of Wendy assisted  us that day of question. I first deposited $50 to my account and requested a receipt for that transaction. Then afterward I did a  withdrawal of $5,000.00. The teller first counted the money in front of me, then asked me if I wanted an envelope for the money, and I responded yes. Everything was normal up to this point. But this what I found odd and peculiar was that she took the money off the desk where I could not see the money or her hands and returned the money to me in the envelope sealed before I could counted myself, and  I never experienced or seen this done in any other banks. Yes I admit I should have opened it and count the money in the bank. But I was in a hurry to meet up with my contractor who I was going to pay the money for serviced he preformed.

nonetheless, when I met up with my contractor at my house to pay him. I did not opened the envelope till the time of payment. The contractor counted the money in from of me. Needless to say he and I were surprised to see the missing denomination of $400.00 out of the $5,000.00 that I withdrew. I asked the contractor to count again, then I counted myself and the denomination were the same, there was  $400.00 short the envelope.  

Of course , I was shocked and tried to retrace my steps whether I did opened the envelope, and it was already too late to go back to the bank the very same day. But I did go straight to the bank to resolve this issue the next day with the manager of the bank Diane Braun on June 29th, 2018 to discuss this matter in person. I informed her of my reasons for the meeting, and Mrs. Braun  informed me that it was normal practice for the tellers to remove the money from the counter and from the recipients' eyes to put into an envelope. Of course that answer did not sit well with me and I asked Mrs. Braun  to open up a formal investigation of this missing $400.00. This could have been a mistake of human error, or very well could be  a criminal act. Nonetheless, I wanted to resolve this delicate matter in an amicable fashion to not smear TD bank's  name. Mrs. Braun said she would find out if there was an overage in her teller's count, and would contact me within two or three weeks to follow up.  

I never received any kind of contact via cell number, which Mrs. Braun had, or email or even in letter  format. I ended  up calling on July 6th, 2018, just to find  out that Mrs. Braun was on vacation. Then I called again on July 31st, 2018 and spoke with Mrs. Braun. She said that upon her investigations there were no overages or shortages in the tellers tilt. I asked her if she looked at any videos for that date of the transactions. Mrs. Braun stated she would have to do a paperwork procedures to look at the video.

As you can see where this investigation is  going, the manager of the TD bank is not taking this serious matter into great consideration. Today is August 16th, 2018. I still haven't received any news from the manager of the bank in the form of cell, email, or letter informing of what else she has done about the  missing $400.00. I am looking for answers to a delicate and serious matter that could easily be a human error or a criminal act on behalf of TD Bank in the Middletown location. I am being kept in the dark about this so far, or Mr. Braun thinks I am going away quietly