Did you save most of the roots, if not i suggest you trim some growth. It was not a good idea to do that planting with that much growth.

The Mango tree probably in shock of moving in the hot sun. You can try to put a shade cloth so the leaves won't get burn.

Tony

It was hard to dig up to be honest. We finally got the one big root that was holding it in. We didn't break that one but lots of the small roots around it broke off. God I'm praying for doesn't die!

OUCH! Well, I'd make a make-shift cardboard canopy for it so it doesn't get direct sun for a few weeks. Don't overwater it; however I would water mist the leaves in the morning.

Should have been done during the coolest and dampest time of the year. Do not cut the top back, that is not helpful. In fact top pruning at planting time reduces a tree's ability to grow new roots.