Commerce Bank Bank Account Or Service Complaint

Commerce Bank Bank account or service department,

Checking account Account opening, closing, or management Illinois

While on vacation my account became overdrawn. Commerce Bank charged my account with - overdrafts in the amount of $36.00 each. I only become overdrawn when my account was charged overdrafts fees When I returned I called the bank and the bank removed - overdraft fees in the amount of $72.00. I went to the bank an deposited money in my account and was charged for - more overdrafts. I called to ask why I was overdraw, because my statement never showed I was overdraw, only when the bank charged me for overdrafts. I was told I had a debit at one time that was pending and that made me overdrawn. Then I recalled I had given the hotel the wrong credit card for my room, which I corrected within a hour. I was told they have the right to do this because the amount was pending even thought it never went through. How can a bank charge for overdrafts when money is never taken from your account. -