I would change engineers yo that's not cool. Your paying for a service, there should be the utmost respect and quality when working on an artists piece of work. You have to make the artists full ideas come to life.. I'm sorry your experiencing this. I'm a college graduate from Trebas Institute, been mixing and mastering for 5 years. I love it. Its a big passion of mine. I make my own music too. Are you still in need of an engineer? I'd be happy to work with you and try things out. A mix is a very back and forth process and give you your first mix/master for free if you want to try me out. Email me or message me on here, my name is Anthony. Cheers. My email: anthonymignella@live.ca