Need help with communication.

I've been married for 6 years. My husband and I have been to counseling because our communication sucks. His words does not match his actions. He says one thing and does another, when I bring it up he claims that he never fully committed to that one thing and that he can change his mind. He's 100% right that he can change his mind but I just want to talk about things. Ex. We have decided to get on a stricter budget. We have a ton of debt left even after paying off close to $100,000. We both decided that we would stop spending money on unnecessary shit so that we can pay off of our house. This afternoon he comes home in a $70,000 car. We can't afford a car like that right now. He claims that because we both make pretty good money that he can go out and buy nice things for the family. This luxury car is not for our family, it's for him. This has been the most frustrating thing ever. I tried to talk to him about it but he left because he didn't want to hear me nag. I need some advice, what should I do because I feel like as soon as he walks through this door that he will get cursed out.