Picture please. Gill UK

I wonder what is rough sand? Unless it is grainy enough that grains do not fall thru the kitchen sieve, do not use it. Most of us avoid any sand, grit is much better. Grit that is easy to find is chicken grit - small granite that is fed to chickens. It is quite inexpensive. What you see on top of soil in the photos is topdressing of chicken grit but bigger size - for mix, the smaller is used. It is sold as #2 here in Canada, and I believe similar in US? - someone should confirm that. You need to remove old soil from the root ball. It could be difficult if it is so hard. Try using some chopsticks or bamboo skewers. Get a bowl of tepid water and let root ball soak in it for a while and hopefully the soil will loosen up. I am sure you'll loose some roots, but getting the 'brick' of the roots is important. Next time you get new plants, try to repot ASAP after bringing them home to avoid same situation.

that's so sad... at least you gave him chance and tried again:) we have had mourning doves, hawks and others fly into our window, some make it and some unfortunately don't :( hope u have a better day tomorrow:)

Spider mites. I don't have ficus, but on my plants a 50-50 mix of water and rubbing alcohol works if repeated every 10 days or so. Some plants can take 70% alcohol and 30% water. tj