What can I do if my CR1 visa was denied at the US embassy in Jamaica in 2011?

Check the refusal work sheet you were given at the embassy. The reason for the visa denial is on that work sheet Consult with a lawyer.

It really depends on what the basis for the denial of your visa was. Did the officer not believe that your marriage is bona fide?

I strongly recommend that you contact an Immigration Attorney immediately. This is not something that you should handle on your own. You should of had an Immigration Attorney help you with the request for new evidence because that was the best time to fix the problem and it only becomes more difficult from now. The appeal needs to be prepare base on their reason to deny (I assume revoke you spouse's immigrant visa petition I-130). If you and your spouse do not fix this now, it can have severe consequences for both you and your spouse for any future petitions or visa applications.

If your case is denied, you first need to determine why. Then you need to see if you have an appealable issue. To do this, you need to hire a competent immigration attorney who handles consular cases, appeals and is familiar with whatever the reasons for your denial were.

You should see an attorney as soon as you can before the appeal period is over.

An appeal would be the only option. The reasons for the denial will be important to consider in determining what realistic options you have.