Samsung can take up to 5 business days to release your funds. It's not the bank. It's the way the transaction is processed.
You could also contact your bank to see if they see anything coming in that haven't posted yet. We used to call it "the dark side" at the bank I worked it. We could see transactions days before going into the account. Hopefully they can help you.
I actually called the bank before calling samsung. The guy from samsung said Its an authorization hold and should drop in few days and if not, let him know