I once deposited 100 into ATM but showed up 80 in my account. I talked to my branch manager and she put that into investigation and turned out it's their fault. I believe at the end of the day if there's 200 surplus, the bank will give the money back to you. sometimes that's takes more time since the reconciliation will take place the second day. so you'll probably hear back from them later. don't worry, have faith in bank and good luck