Thank you for clarification.
Since you were never actually divorced from your first husband, your new marriage is not valid. Thus you are not legally married to your new husband according to CA law. If you were married to the first husband for all of this time you need to provide proof to the SSA that you were never properly divorced and as such you would be entitled to the surviving spouse benefits from SSA.
You need to file a written appeal to SSA and provide proof that no decree of divorce was ever filed in the first marriage, so by CA law you are still legally married to your first husband. If they deny your written appeal, then you will need an attorney who will have to file for a hearing with SSA and will have to go before the administrative judge and provide the evidence that you were never divorced and as such are still the surviving spouse and you have not remarried because your current "marriage" is void because you were never properly divorced.
As far as your new marriage, you should not do anything to remarry, leave the marriage void in order to collect your benefits based on your first husband.
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