Hello from JA My name is Woody. I will be glad to assist you today. I have been servicing ALL Major Brands of Appliances for 32 Years, and have over 100,000 in home repairs under my belt.
In order for it to freeze the temperature had to drop below 32 degrees.
May I have the model number of the unit ,
Most of these water bottle on too models are condiered by the manufactures as disposalbe with no replacement parts .
But I will not be able to know unlil I have the model number .
yep this is one of the one considered by the manufacture as disposable .
No internal parts are available for replacement , the only parts available for replacement are the drip tray and the shelf .
If it is not the bottle that is leaking ,(which it does not sound like it is ) I hate to say it but you are out of luck ,unless it is something you can jury rig to get the leak stopped.