Restricted Account

Coinbase has restricted my account for months now, and they won’t tell me why. I can’t send any crypto off their exchange, all I can do is sell my coins, significantly lessening my profits, and withdraw USD. So essentially I’m stuck either losing future money, or held hostage on their exchange. I pay for Coinbase one and I’ve opened three separate tickets with them, the only thing they will tell me is that the account is under review. Won’t tell me how much longer, or if there’s anything I can do to assist with speeding up the process.

Does anyone have any suggestions? I’m getting extremely frustrated.