Will not give me my retirement money

I have been trying for a year to withdraw 401K money from VALIC in Amarillo, Texas. They tell me to send one document. After I send that, they say and, oh, they need this other document. They didn't like how I signed my name. After I resent the request, they said well, oh, you can't reuse a request that has already been processed. There is no end! I'm going to run an ad asking that people who have had trouble getting their money from VALIC please contact me. Maybe some lawyer would be interested. VALIC said they are regulated by the insurance commission. I asked because I need to file a complaint. They are trying to keep my money and I guess they think I will give up. One of their tactics is to try to get you to hang up on them, which I haven't done. It is maddening! They are horrible and shouldn't even exist.