More information would be helpful. Are you renting a whole house? One unit in a two unit building? Do other units have water? Are both the kitchen and bath faucets not working?

When our pipes froze, I could tell it happened somewhere between the kitchen and upstairs bathroom. Used a heat gun on the tile along the wall. It eventually thawed. Lucky it didn’t burst.

To thaw the pipes you need to warm them up. Open cabinets under the sink and bath vanity. If you have a space heater or can borrow it, use it next to the wall closet to where you think the pipes are frozen. Keep the taps open when doing this so you’ll know if it’s working.

If you use a heat gun, don’t keep it pointed at a painted surface. It will bubble and strip the paint.