This type of question comes up over and over again, the answer is always the same.
In domestic violence cases it is so common for a victim to 'withdraw' a statement that the CPS always proceed with the case.
You CAN NOT withdraw a statement once it has been made!
All you can do is to do as you did and make a second statement saying why the first one was wrong. The first statement is still evidence and will still be used in court.
The main and most common reason for a domestic violence victim to try to withdraw a statement is that they have been threatened with even more violence unless they 'drop the charges'.
I AM NOT ! saying this applies to your case but it is a VERY common reason for a victim trying to withdraw a statement.
If the case goes to court you MUST attend, if you do not attend you will be arrested and brought to the court by the police or a court officer.
If this happens you can be treated as a 'hostile witness' ! This means the court assume that you are refusing to attend because you are too scared of the person who assaulted you to come to court. This will make it a LOT worse for your husband!
You have no choice in the matter it has gone too far to change anything.
To sum up . As I said the case WILL go to court and you WILL have to attend, you CAN NOT say you do not wish to go to court! If you refuse to go you will be forced to attend by being arrested and taken to the trial.