Green Dot Bank complaint: Won’t give me MY MONEY

Last year for whatever reason my greendot prepaid turbo tax card was closed out by the company and my thousand dollars frozen! I called them because I wanted to know in what grounds were they allowed to completely close out my account and I was given NO answer! I was informed the only way to get my 1023.00 dollars left on my account was to have a check mailed.. I was promised a check within 14 days! Well 3 months went by and I received no such check so I called them back again and told them I never received my money they informed me once again a check would be mailed! It’s been over an entire year and still no closer to my money from greendot! I want my money? How can they legally keep my money? How is this allowed? This has caused me so many hardships! Pay me my money NOW! THE MONEY BELONGS TO ME! WHO DO I GO TO TO TAKE LEGAL ACTION?