What can I do if my ex still has not removed my name on our property which in the divorce decree he had until 2012 to refinance?

You can go to court to get the order enforced. Talk to your attorney about whether the bank will pay any attention to the order.

File a motion for contempt asking court order him to sell the property if he won't or can't refinance.

Engage an attorney to enforce the judgment in the divorce court.

File a motion in the court that issued the divorce judgment for his contempt of that judgment. In the motion ask that the Judge give him the option to refinance it within 3 months to take your name off the mortgage or if he cannot force him to sell it. Most likely his excuse will be that he cannot refinance because he cannot get a loan (many mortgages are underwater) but that is not your concern he has encumbered your credit. Now the real issue becomes if the house is "underwater" i.e. the balance due on the mortgage is higher than the house is worth. In that case he may have to come to the table with money to refinance it and if he does not have the money how can he refinance it? Then you force him into a sale anyway but your credit may be hit because you are still liable on the mortgage.

If it is in the divorce decree, you can go back to Court and ask the Judge to find him in contempt and force him to comply.