Repairs

So about a year ago the false roof of our bathroom fell in. We had to call a guy for repairs. He came and fixed something, took a bunch of money and left. The air-conditioning in one of the rooms got stuck at 21 degrees so we called a guy. He said something about a thermostat and fixed something, took a bunch of money and left. A couple of weeks ago the roof started leaking and I put buckets and tumblers to catch the water. So today I called a guy. He came with a ladder. I heard a lot of drilling and something about full service and thermostat. I agreed to the full service but put my foot down at the thermostat not knowing anything about either but wanting to sound intelligent. So he said something about the false ceiling probably falling down again so I agreed to have it replaced. There are a few other repairs which need to be done and he tells me he will get 'top quality' stuff. Yes you guessed it, he's going to take a bunch of money and leave until something starts leaking again and falls on my head.