Worst comapny ever! Starting from last month, the ...

Worst comapny ever! Starting from last month, the company started working on the pipes inside of the walls in my apartment. Their plumbers came whenever they want. The company even refused to give me just a clear schedule. I never knew on which day they would make my apartment a mess (This is no exageration. The worst happened on the first day of their work. Everywhere in my bedroom was covered by dust). Now they finally finish fixing the pipes, but seemly do not have any immediate plan to fix the big holes in my walls. With the anticipation that their workmen would come any time, I can't move my stuff to their original place or to plan to stay in the apartment in the day time.
I went to the company to talk about the issue in person the other day, but they still refused to tell me when they start the work! Trust me, this is the worst company ever!