Some years ago, my sisters truck camper, which was on it's jacks in my other sisters backyard, twisted and fell sideways. This pulled two of the jacks almost out of the side of the camper and the whole thing was nearly on it's side at about a 45 degree angle.
There was no way a large wrecker could get back there so a friend and I, using two 12 ton bottle jacks and a whole lot of lumber, spent several hours jacking that thing up a bit at a time, then placing boards under it to hold it while we raised the jacks, and then jacking again. This continued until we had it high enough to back her truck under it and then we fixed the jacks and mounting points.
We also ran a heavy tow strap around the camper and to a nearby tree to keep it from tilting any more or falling farther. We also used a couple of heavy saw horses under the bottom of the camper to help steady it as we jacked and to hold it while we put boards under each jack. We went VERY slowly and tried to do both sides equally fast after we got the thing fairly level.
Once we got it high enough, the saw horses were removed and she backed her truck under very slowly and carefully because the thing was really delicate and could have fallen easily. It worked though and she was able to get home to California without farther incident.
She did later, after getting home, get a
Stable-lift jacking system that she used for quite a few years after that without incident.
Hope this helps you out and good luck! :)
Barney