Xiaomi India — despite being open serampore service centre refuses to listen about redmi note 3 problem as bcz i haven't went between 12pm to 5pm

My redmi note 3 is nt geting switched on suddenly and i have taken that to the serampore service centre, wb. It is the second time i m visitng rgrding ds problm they havnt listen to my query as it was 6pm despite being open. They informed that after 5pm the service centre is availble for new customers who r planing to buy new redmi sets and nt for any query regarding the phone problem. May i please know wht type of service is dis? And what typ of time limitation is ds dt only btween 12pm to 5pm phone prblms r pampered no matter wht is the closing or the opening time fr d service centre is..