Not sure if this is the right type of question to ask here, but I'm sure there are some plumbers here.
It's a long story so I'll just cut to the chase: I literally did not have hot water for 2 months because the plumbing company that installed my water heater was extremely annoying and unprofessional and strung me along this whole time. And they're not owning up to their mistake and instead just gaslighting me and blaming me. Holy crap I'm so pissed off.
What are legal means I can do to get back at them?