Make My Mortgage and My Mortgage Company Go Away-

I was married for 30 years. We bought our house on year two of marriage.
Three kids and a house addition made the mortgage go up to 80 thousand. It has stayed that total this whole time due to several refinances. Not the best choices. Then there was a divorce. I am trying to keep my house. I have been divorced for three years and am newly remarried. Together we make just enough money to get things paid.The mortgage company keeps refusing to let me assume my mortgage- they say i don't make enough money, even though I have worked hard to pay the mortgage payment on time each month for the past 3 years. I am at my wits end. I am working hard. My new husband cannot be used on the mortgage because of supporting three other children and helping his mom and invalid brother- he is letting them live in his house that he can't afford. We need to sell it but find them a place to live first. And there will be no profit on this house. But I don't have enough time for us to get all of that taken care of. Ahhh!! I just want to hand the company all the money owed and give them a big smile, and then own my house. I am working as hard as I can- substistute teach, tutor, clean. It is the most humiliating thing to have this company tell me I can't own my own house. Please help. Thank you.