calamondin orange resurrection

My indoor calamondin orange tree has had a bit of a tough summer, I was away from home during the heatwave and came back to a very thirsty and dying tree. It has since stabilized and has a few healthy branches remaining. I have removed the dead leaves and fruit and lightly pruned it but there is no sign of recovery on the leafless portion of the tree. Can anyone advise the best course of action to try and stimulate growth? I thought about leaving it as is over winter then pruning more thoroughly once things pick up again in the springtime. 
Any help is much appreciated, Laura.