Roommate doesn’t listen🙄

So I’m living in an apartment on campus and I have one roommate. I always buy most of the groceries and were supposed to split it and she never replaces what she eats of mine. It get cold in the apartment and she turns the heat up to 80 when I told here that we have a certain allowance for electricity each month. I’m okay with her eating what I cook but she always eats the last of it which I think is rude bc she didn’t even put in any effort to make it. And not to mention I told her the very beginning of the year to not use silverware in the brand new pots and pans that I bought and was nice enough to share and she used a metal spoon in one last night and now the nonstick part is scratched up. I guess my question is how do I address ALL of this ?