hey dont keep their promises, they coming for installation on Monday but they didnt come, no communication no one called

They dont keep their promises, they coming for installation on Monday but they didnt come, no communication no one called to say they not coming. today again they said they coming at 8am they will be my place. around 11am i called again they told me they dont have the order, so they cant come without the order. I cancelled my plans for today thinking that they are coming for installation.