Haven't used Coinbase for years but earlier they used to terminate the account instead of 'disabling' so the good thing is user has access to withdraw all the funds in the account before termination and that is the only access they will give you and it most likely happens if you deposit funds from gambling wallet.

Maybe they updated their terms in recent times which allows them to hold the user's funds forever.

And there is no further point in arguing because they will keep repeating the same auto-generated emails for your support tickets no matter what and close the support ticket as resolved without even addressing what is the issue. So move to better exchange which gives better User experience.