OK, first of all, take a deep breath, then let it out sloowwwwwly . . . .
So far, so good - you got the buck out. Maybe, with a little luck, the doe didn't get re-bred, but I wouldn't count on that. Go mark the date on your calendar, because your doe may be going to present you with another litter 31 days from now.
You collected the babies together, with as much of the doe's hair as you could salvage - good job. Personally, I like hay, not wood chips. Unless you are dealing with cool temps, 7 babies should be able to keep each other warm for now. The doe did not put the babies through the wire, they fell out - newborn kits do a lot of crawling around, and they easily fit through regular 1"x2" cage wire (that's why "Baby Saver" wire has 1/2" openings on the lowest couple of inches).
You put the babies back in the cage, and the doe knows where they are. Did you put them in the corner where you found the hair? That's the best place for them. Hopefully, the doe will settle down soon. I have had new mothers jump in and out of the box so much, they wound up trampling the kits and killing them (I think this is the real reason kits die when a buck is present, because I have never seen a buck show any interest in kits at all, one way or the other).
First-time does don't have a great deal of milk for the first couple of days, so it can be a little hard to tell if the kits have been fed. They may not have huge, full tummies, but they shouldn't look slack and empty, either. For the moment, the more you mess with the doe, the more upset she'll get, and that's really not good. Normally, she would only feed her litter once or twice a day, and completely ignore them except at those times (around sunrise, and maybe sunset). If the doe still hasn't fed them by tomorrow morning, you may need to take further measures, but right now, the best thing you can do is make sure the kits are warm enough and together, and things near the cage are as peaceful as possible. Other than that, you need to just leave them alone.
