Call whom? Marriott: Zero chance. The hotel: If it will make you feel better reach out to them, but really, if they made the decision they have enough inventory set aside for points redemption and can sell the rest, what do you think you will accomplish? You don't have the facts or numbers to support a decision they made based on the facts and numbers. Hold the dates you can get now. Check the website every day to see if someone has canceled, opening inventory for your missing dates. Be flexible.

Yes, I've reached out to hotels before. While PP. It has never worked. It doesn't hurt, as you will still be without the room, so why not? Even if you have a 0.000001% chance of getting the room, that's more of a chance than you would have if you don't reach out. You may find a miracle. Just don't expect it.