Azalea Satsuki - dry, yellowing leaves

Hello, 
I am new to the forum and recently 
received a Satsuki Azalea as a gift on 
July 2nd. The pic attached to this message is from today. 

It looked fine when it arrived 3 weeks ago... the leaves were green 
and supple. I'm in southern delaware and we were having a heat wave... 
100+F. Because of that I did not want 
to put my new azalea outside. I kept it on the screened in porch but not in 
the direct sun. Watered it every other day and misted the leaves once or 
twice a day. 

It started looking bad about a week 
later and I looked up on this site what might be wrong... and I thought I 
should try repotting it. I got some all 
purpose bonzai soil and akadama off Amazon. 

It seemed to be recovering and I kept 
it on the porch, but a few days later 
the leaves started to dry out again... 
then turning yellow again. I went 
away for 5 days and my husband 
watered and misted it. Now I'm home and the leaves are crispy and more 
yellow. 

Some of the roots were exposed on top so he put some regular garden soil on top to cover them. 
 
It's 80F so it's outside now.

I am absolutely looking for some 
expert advice on how to remedy the 
situation - if I can. Otherwise, I'll be 
buying another Azalea Satsuki and not tell anyone! 

Thank you!

The tree is already dead or will die in winter.

I do not think buying a new one will solve the situation. I suggest buying a good bonsai book now and start studying. Come authum look for cheap garden center materials to practice on.

Probably not enough water, and re potting finished it off.