As I said you can not withdraw a statement once you have made it.
(That is to make it as though you had never made a statement in the first place.)
You can of course make a second statement and say that you now realise that the first statement was wrong and you now want to give a correct version. But the first statement will not be destroyed, it remains part of the evidence and can be used in court by either the prosecution or the defence. ALL statements will be read by the judge or magistrates.
In domestic violence cases it is so common (almost normal) for a victim or assailant to 'withdraw' a statement that all statements will be used by the prosecution. The CPS have a policy of proceeding with domestic violence cases even if statements are 'withdrawn' as long as there is other evidence , for example police ,doctors, hospital reports of the incident and injuries. So even if you 'withdraw' your original statement the case may proceed on the evidence of the cuts to your arm which will have been recorded by the doctors and hospital and the police report of the incident.