Fort Sill National Bank FSNB Begin charging my debit card $1.00 for each declined transaction

This is neither the bank's fault, nor is it Amazon's fault.  If you aren't the one running charges through your account, then someone else is, which means someone either you don't know, or you might know, has your card or account information and is using it to your detriment.  It's time now to go to the bank and ask that they close your current account and open a new account - immediately.

The problem you have is that Amazon is going to continue to try and charge you $20 per month to the new account.  I would at least call and provide them your name to see what services are being charged for $20 and cancel it quickly, if the bank is unable to stop the charges.  Best of luck to you.

 This is YOUR account containing YOUR money. You say Amazon has been charging you for some type of service that you don't know about. Why do you NOT know what's going on with YOUR account??? This whole thing is stupid! You never balance your account, you don't keep a register of the use of the card...in short, you don't even have a clue as to what your balance is because you don't do any of those things which are called ACCOUNT MANAGEMENT! You can blame the bank all you wish but the bottom line is its up to YOU to know what's going on with YOUR account, containing YOUR money! As we can see, the Dumbing Down Of America...have a checking account, never balance this account and keep no written records. Am I ever impressed!