The bush is dormant now. Even if it wasn't when it was attacked, doing that made it dormant.
I'd remove it from the pot and check if it has enough roots to survive. If not, toss it.
If the roots look OK, wrap it in wet newspapers, tie it with twine, and bury it. When you can dig in the soil this spring dig it up, prune as best you can and either plant or pot it. It should survive if not damaged too much.
I'd pot it until I found out what it was. It could be just a Dr. Huey rootstock or something you may not want. You can always regift it if it's worth saving and you don't want it.

Thanks for the advise but I need a bit more specifics. If it has roots, wrap it and repot it, in a bigger pot or the same one? Should I use potting soil or reuse the dirt it came in? And then what? Put in the garage since it is dormant? Or should it stay warm in the house under a light? Excuse my ignorance on this subject, but like I said I previously. I know NOTHING about roses.

Every rose grower can have a different answer to a rose problem but here is mine. Because you don't know if the rose has been severely damaged, I would heel it into the garden and leave it there until it is warm enough in the spring to plant. By heeling in I mean to dig a hole deep enough that when you lay the plant on it's side, you can cover it over with about 12 inches of soil. Don't forget to put some sort of marker near it. In the spring when you have had the last of the hard frosts, dig it up and re-plant it in the garden. Because it has been through H**L and back, the dampness in the soil should help with the dried out canes. If your friend has grown it in the same area as you live in then it will be a hardy enough rose for your garden. The rose may struggle and look sad but in the spring sprinkle a handful of any rose type fertilizer all around the base and then place some sort of mulch around the base too such as compost, wood chips or anything you can get in your area. Because the roots are damaged you will have to do the job of the roots so make sure it is watered well even in the summer. Don't give up as the rose may take a summer warmth to respond to your kindness. However be prepared that this rose may have been killed by slicing too deeply through the middle as most roses are budded onto what is called an under stock and if this is damaged then that is not a good thing for the rose. However keeping it in the soil over the winter may encourage some feeder roots to grow or even it's own roots. Again many gardeners have brought back roses from near death so don't give up.

Thank you for your response. Since it is about to snow again should I be worried about the healing in thing. Or is 1 foot of soil enough to protect it? (I assume you mean cover the entire rose, not just the roots part..) Should I wrap the the roots in moist newpaper (as the previous person suggested for repoting) and then heel it, or just heel it?

Wrap it in damp newspaper and bury the whole thing, the sooner the better.

You have received some good information above. Especially what Karl said about whether or not it is worth saving. I don't know if you're passionate about growing roses or what makes this rose special to you. If anything. But if you don't want to go through the paces of trying to save this poor thing that has been so abused already you might ask yourself if just checking around at some of the reputable online vendors for a rose that really suits you and your situation might be preferable over applying CPR to that rose.

Just a thought. Good luck with whatever you choose to do.

Kate