my home was sold illegally and they are trying to get us out asap what can i do?

we were under modify process then after 5 months our home was in foreclosure we called nationstar and they said we were fine don’t worry modify was still in process then our home was auctioned off!!! we didn’t know until new owners came by and put papers on front door we were shocked now I’m fighting to keep home is there anything we can do to reverse this seems so illegal to do this without any notification or paperwork!! i hope you can give us advise thank you

You will need to find a real estate attorney to determine your legal rights. Sorry we can’t assist you further.