Discrimination and false advertisement

hello, so I had filed a dispute with a green dot for some transactions that I am not aware of. I was told on the first phone call that I would get my provisional credit 10 days after the dispute was made. 10 days came and no credit so I called them again and I was told that it’s 10 days after I sent my letter to them about my dispute. so I waited the 10 days and no credit. I called them again and was told that it’s 19 days after they receive the paper and when I asked to talk to a supervisor, they argued and yelled at me about how I couldn’t talk to a supervisor and how they were going to tell me the same thing I was just told. I eventually was sent to a supervisor and she told me a whole another date I would get the credit. this is wrong and it’s a false advertisement and lying. as well as every person that answered the phone anytime I have called has been rude and disrespectful and because I am of color they don’t want to send me to the supervisor. also, the supervisor hung up on me when I asked her a question regarding my rights as a customer. I am very angry and at this point ready to sue green dot. I believe they should resolve my case by giving me the provisional credit asap because of all the troubles and lies and disrespect. I also think they should train their employees better than they do and maybe care about their customers a lot more than they do. thank you