I think the CM who told you that was wrong. If your resort won't be open, they will almost certainly move you somewhere else that is open without making you pay the difference. You just probably won't get to choose where they put you (if you want a specific resort, you'll likely have to pay the difference in that case). I'd give it a day or two and then call back. Clearly Disney didn't do an adequate job or preparing for this, and none of the CMs know what's going on right now (at no fault of their own).