Can a bank draft your account after closing?

[Julian Hamstead]

We recently used a well known hard money lender, who secured a correspondent investor and then secured a bank loan on one of our flips.  The entire process was riddled with challenges from the set up of the draft, purchasing insurance on our property when we already had it in place, additional fees at closing and now...they just drafted our account AFTER we closed.  We are now being told that they won't reimburse that money for 15 days and there's nothing they can do about it.  How is that possible/legal/ethical?