You are in a difficult financial situation. You have, essentially, one 'hail mary' strategy -- try to get the lender (whoever the mortgage company is) to remove your name from the account and also to try to get them to take your name from the credit report updates... then contest the trade line with each of the credit reporting bureaus.
My best recommendation is to contact the mortgage company, explain your situation, and ask if the lender will allow you to be removed from the account. I would tell you, however, that this is very unlikely - as they will not want to lower their risk by removing someone from the account.
If you are struggling with debts after divorce, you should know that you are by no means alone in this predicament. Divorce drives more Americans to the edge of financial disaster than almost any other life event. It would have been helpful if you had a legally binding divorce decree, but just so you know... even a court mandated divorce decree is not necessarily enforceable by your creditors -- so you may have been in the same situation.
I would certainly recommend sending in a letter, explaining the situation and request that this letter be included in your credit file.
There are three major credit bureaus that offer credit reports, if there is something that you want added or removed, you should contact them directly:
If you need other debt help, Bills.com makes it easy for you to apply for qualified providers of debt help, by following this link.
I with you the best of luck in resolving this situation, and I hope this information helps you Find. Learn. Save.