Tp Link — $400 router with non working firmware

I purchased the greatly toted tp link archer c5400. Setup was easy and i had set it to take automatic firmware updates. Big mistake! After 6 days of operating flawlessly the router just stopped working and went into an endless lop of powering off and on. I call tech support and wait forever for a tech. Over an hour later the tech realizes what i had told him in the beginning was the case. A brick!! He says an rma # will be emailed to me for a replacement. I need to hook up my old netgear router and wait for the email. Instead i receive an email from a gal from customer service stating they were sorry but they could not replace this $400 piece of junk because it was purchased on ebay. I informed them it was new and registered it on their website, but it turns out ebay is not an authorized reseller of tp link junk! Stay away from this china made product!!