Change FB Name After Limit

i). First of all Go to account settings of your account andchange your name from already listed names in the drop-down menu of name settings... (Very Important - do not miss it, or you can not change name)
ii). Now Click on deactivate your account
iii). In 'Reason for Leaving' select the option My Account was Hacked
iii). Now a box will be displayed with a text "You can secure your account here." you have to click on 'Here'  and follow the steps.