If you incurred any fees because of this transaction. They will undo it if they detect you are pissed off. Tell them you will write letters, tell your friends not to bank with them, etc. Tell them you think it's an unfair practice and don't let them hang up until you are happy. If it's BoA also point out this:
http://en.wikipedia.org/wiki/Bank_of_AmericaExcessive overdraft fees
In 1999, a class action lawsuit was filed against Bank of America for engaging in the practice of "Biggest Check First" check clearing. Put simply, the bank clears checks in order from biggest to smallest, with less regard to when they come in. Customers allege that this is purposely done, to cause more checks to bounce, triggering more overdraft fees for the bank to collect.
Here's an example: A customer has $1,000 in his checking account. Check numbers 101 through 104 come in for processing for $60, $10, $30 and $950, in that order. If the checks are processed by the check number or in ascending order (smallest to largest), the first three checks will clear and the fourth will bounce, meaning the customer will be charged one fee for insufficient funds. NationsBank (now Bank of America) charged $29 for each bounced check. If the checks are processed largest to smallest, however, the $950 check will clear first, and the checks for $60, $30 and $10 will bounce, resulting in $87 in fees.
The bank employs the same practice for ATM and debit card transactions. Another example: A customer has $100 in her account. On Saturday she withdraws $80 from an ATM. On Sunday she buy a coffee using her debit card for $3 and fills up her gas tank for $15. As of Sunday night, she still has $2 remaining in her account. On Monday, her recurring monthly cable bill is auto-debited from her account, for $150. The bank clears this transaction even though the customer is now in the negative. This is standard grounds for an overdraft fee, so the customer expects to find one on her next statement.They don't like to have that thrown up in their faces and the customer service people don't who to respond to it.