You should have played safe once Coinbase announced that they are going to suspend deposit/withdrawal. I've say it's a bad move on your part not to take your XRP or buy more in that platform. Now they have total control of your funds, so let this be a lesson to you.

And the only one that can really help you out is to contact their support and tell them your situation. I don't know if you can get back your money or your XRP though. In any case, good luck to you.