There are people complaining that they can't get through to customer service on their phone. Like, do they expect them to always have enough customer service capacity for when every single customer in the world has reason to call them? That'd be insane.
Flight cancelations are always a risk when flying. You need to always expect that you'll potentially have to be stuck somewhere for a night or two. If the airport floor doesn't suffice for you, fly airlines that have a track record of giving hotels for cancelations and have insurance/funds to cover a few nights if you aren't able to get a room from the airline.
This kind of stuff is unavoidable and just part of air travel. Be prepared, be patient.