Plum tree

I will spare you a photo. Our flowering plum tree did not survive just before the summer I'm certain its on its way out. I'm also fairly certain that the neighbor that we paid to pick our tree up that insisted on planting it just tossed it in the hole. I knew better then to let him I should have insisted on doing it my self to clear out the old trees roots, which I don't think he did. I also should have bought tree soil and tilled it all in. Next time i will. The sun and heat is really harsh out here. Every day this week has been 105 - 115 degrees its just unbearable to be outside I will try to plant something in the fall.