R7000 ac1900 wont reset no matter what i try even tried everything everyone on here has already said

i have tried everything on here that everyone has suggested.  why cant i just send this router back to Netgear and have it fixed by them since they are the ones who screwed it up a while back from one of their firmware upgrades according to all the forum posts on here.  i cannot get speeds above 50Download no matter what i do.  i even tried to reset back to orginal setting according to what everyone on here has suggested so that i could try to fix with the firmware updates according to whats been said.  But for this to work i have to be able to reset the router back which it wont.  getting irritated

need an address to mail this Router back to to have fixed or whatever