The platform won’t let me withdraw, and I have to pay 30% tax to withdraw cash

In the past, every time I withdraw cash, it took me a few minutes to reach my Coinbase wallet. Now I withdraw cash, but the platform won’t allow me to withdraw cash. I have to pay 30% tax to withdraw cash. I also told his customer service that you can get it from I deducted 30% from the cash withdrawal, and he said no, you have to pay 30% first to reflect it. I can’t believe this. I’m afraid that after paying 30%, I still can’t withdraw it in the end, and I don’t know what to do.