Can I issue a complaint against my bank to the FDIC?

So, I was successful in closing my account down last week and reopening a new one. When we were setting up my account they asked me if I would like to set up overdraft from my savings, and because of debt from pda's in the past, I never wanted to get into that again and I said that I would prefer to take my over draft line of credit, which was $1000, away. Well, here I am thinking that I have been a customer with them for a long time, nothing will change with them. I go in to deposit a check from my mother for my rent that is due on the 1st of the month (ON MARCH 26TH, BY THE WAY!!) and they want to hold the check for it to clear until APRIL 5TH!! My mom has always sent me checks and I have always deposited them into an account with them. (My mom lives in another state.) Anyway, I go in yesterday to get a check to pay them and the guy tells me I can't get that much cause they are holding my mom's check. I was like what???? He said on new accounts it always takes longer. I'm okay with that as the system they have might not be able to be over-riden or something...so, I leave because the guy I'm dealing with inside the branch is an idiot. When I go home I call the lady that was so kind with me last week in assisting me with closing my account and setting up my new one. When I call she's out at lunch, so the girl that answered asked me what it was about to see if she could help. I was calling to ask them to bring over my over draft line of credit from the old account ($1000) because I needed to be able to get money for my rent. The girl was like that is something my MANAGER needs to talk to you about, one moment...Then I get this lady who takes a look at my old account, and then goes to search for my mom's check. They don't have it of course, and then she was like I will call you back and tell you if I can let this clear. She calls me back about 10 minutes later and said the only thing she would be able to do was clear the funds in my account once they clear my mother's bank. I ask her then if I could bring back my $1000 over draft line of credit and she researches it and comes back and tells me we can do it. I specifically asked TWO times at the end of the call if she was SURE that we could bring that over to the new account and she responded with a YES I CAN DO THAT, both times!!! Today I needed to go in to make a deposit so before I go in I check online to see if the website shows my over draft line of credit, but it shows it hadn't changed. When I'm at the bank I ask a manager for help, and they leave me sitting there for about 20 minutes, then they stated that the girl I talked to didn't "memo" my account, nor do she have any recollection of our phone call!!! I have proof that Washington Mutual called me back after I called them first with my call records. I was telling the other manager that was there today that this is really important to me, and she stated if she HAD changed it they won't know until they talk to her on MONDAY!! I get out of my chair INFURIATED and in TEARS and just leave. It seems like they are trying to take back any promise by that "manager." What's even better is the original teller that asked me who it was I was speaking with laughed when I said her name and MANAGER. I was like, what is so funny? He said she THINKS she is a manager, but she isn't. I believe Washington Mutual should have to follow through with their promise to me. I have never felt like such a bad person as I have today. They really made me feel like slime of the Earth. I don't know what to do, but I really feel this is unfair that they are probably not going to follow through. Any suggestions? AND, may I follow a dispute with the FDIC because I was LIED to by the bank??? Please, anyone that can make suggestions would be appreciated more than you know.