My Landlord Failed To Fix The Heat This Winter And Is Now Making Me Pay For It

Hello! I’ve had a lot of ongoing issues with my current rental and it’s hit a bad point. I live in Missouri and haven’t had working heat in my unit all winter long. I’ve reached out three times. The first time they sent someone( 11NOV24) and he said he would have to do more work but he doesn’t know what’s wrong and I texted her on 20NOV informing heat still isn’t working and it’s cold and she said she would try to reach out to someone. No word from her until January 03rd because they are complaining the electricity bill is too high. It’s high because I had to get a space heater which they approved. I then had to buy two more space heaters because the bathroom is unfinished and snow is coming in through the ceiling. And there is mold on the ceiling that I’ve brought up more then once ( text screenshot proof) . Now they want me to pay the extra electric and they refuse to reimburse me for the electric heaters I had to buy. Do I have any type of case here? I might be leaving some stuff out, but I have text proof of when I reached out. I sent proof of the temperature being 55 degrees in my unit. My rent has been up to date. Okay, thanks for reading!