Sue them or cut them off from utilities

7

Before going full scorched earth I’d sent them a text that says that whatever personal issues you two are dealing with does not mean they can opt out of utilities and give them a deadline to pay their half. After that You can’t do much about the plumbing but if you know where the circuit breakers are you can turn off the power to her room. You should also change the WiFi password if that’s part of your utilities, heck you can even block her devices from the router.

5