Where do I find all of the parts needed to make the air conditioning work?

What is your question?

I don't really know what's wrong with it yet my mom said the whole front panel needs replaced and wherever she took it they told her they couldn't find it. So instead they made the air conditioning come out the defrost vent only and it constantly needs filled up with freon. So I'm just want to know where I can order every single part needed so we can try to fix it