You can contact USCIS for any name or SS# corrections with supporting documents.

Obtaining an IV would be longer abroad for your spouse.

The nearest British embassy/consult may be of assistance as well as British immigration Solicitors. Good luck.

Proof of assets and bank statements are among others to consider. Consult an attorney for further assistance.

It depends on the type of legal help. It may be possible to locate lawyers who are licensed abroad and the US. Good luck.

Recommend consulting a lawyer in private to review your case to avoid jeopardizing your stay.

Your question is less than clear for a valid answer.

CEAC is a platform NVC uses for IV adjudications.

Due to the complex nature of immigration law, it is wise to hire an attorney.

Probably yes. But how does it matter for your rejected application. Consult a lawyer for further guidance.