Forgive my ignorance I don't know too much about cars. I have an r60/2014 Countryman. When my bf and I lowered it and changed the suspension he put his wheels on it. He has a 335i or 340i (Always forget lol). Anyway, my mom ended up borrowing my car recently and now the <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}-->https://9apps.ooo/ front right wheel is slightly curbed and the tire is flat. How do I go about fixing this? Do I need new tires or what can I do? I'm stressing considering they aren't my wheels.

 

First step is to take that wheel to a tire shop and see if the rim is bent. Hopefully all you need is a new tire.

 

I've had rims on both my Mini and my Jaguar straightened, repainted and refinished. Cost was $150 each. These guys are really good. https://arswheelrepair.com/dallas-rim-refinishing/
You have some similar company near you I'm sure.