Why wait? If you aren't getting value from the academy then why stay?

its a business, very few care about the customers . the best ones do

Man that sounds rough. I know the feeling of being used though. It's not a very pleasant feeling. To feel like you're giving everything you have to something and someone else is just going, "thanks very much!" and scarpering for the hills. I would say that maybe you should focus this time on honing your skills. Keep working at your craft. I know that it will be hard as it sounds to me that you would be more than qualified to sing full operas. If you work on yourself more, when the time comes that you can leave the academy, you can blow someone else away with how wonderful your voice is. I truly believe that you can power through this. I offer you my full support in doing so and tell you, that you do not have to go through this alone.

There are good teachers that will work with you