Lumia 435 not accepting hard reset any solution, what should I do?

my lumia 435 does not respond hard reset......... , when i goes for hard reset after tapping the volume up key its again restart...
plz help me.....

Try the Windows Phone Recovery Tool.

i did this many time...... but nothing get affected....

Does the phone boot up completely? If it does you can do a hard reset from Settings.

Yes it is completely boot up but why my handset does not hard reset when i press volume down key it restart again....