renasant bank abusive overdraft charges Internet

didnt notify me that they changed the time of the buisness so i have my check deosited by some one else so i did my shopping as usual and instead of them declining my debt card they let all my trans actions go through ,but i was told by them when i opened my account that if the money wasnt there it would be declined  which didnt happen and all they have to say is they wont do anything about it this happened the 24th of dec. it was a holiday is there excuse but to day is new years eve and my check was deposited and it was excepted so of course i guess it only works if you owe them money they got the bailout money and us hard working people get ripped off on my deposit slip it states that it should have went through cause you have up to 4pm i had my was deposited around 12 that by a friend so i wouldnt have known if anything at the bank was different than any other day i dont see how in good conscience do this i have had an account with them since 03 i wish i would have listened to everyone who said to change banks della hickory flat ,ms