hi bro all here, i need advice regarding on my contract.

my contract list i need to serve 1year/12month and after confirmation need to give 1 month notice. my last date is 19/8 and i submit my resign latter to HR few day ago.

The HR say i can not resign now because i need to finish my contract 1 year then only can resign and need 1 month notice. so which is i need work until 19/8 and plus 1 month notice then the last day is on 19/9. if they proceed my resign latter then i need to pay back the whole year salary.

so now is that i have no choice to follow them my last day is 19/09 or i can just stop work after 19/08?

thanks for the advice