Nighthawk EX7300 x4 will not Factory reset no extender wifi

I am trying to reconfigure my extender to my second floor. It has not worked properly for all devices. I realized we needed the "one name" option for the TV service (AT&T Uverse) to auto-switch. When I reconfigured, it did not go as expected. I can't go back into the Admin panel to make any changes, because now that the network is the same name, it is not appearing in my wifi network selections as "netgear_ext" any longer. I must have missed a network setting or something on the reconfig.

I can't use an ethernet cable, because I do not have an adapter to hook up to any of my devices. I can only use wifi, and my windows and iOs devices will not display the extender network. I did all of the clearing of the cache and tried all sorts of browsers IP addresses,and devices, and I can't login anywhere.

I tried doing the factory reset, but I do not detect any changes, even though I did see the "amber" light display after the green. Should I start over with a new model? I think there is a warranty, it is only 45 days old.

I have spent many hours on this, and it looks so simple at first glance. I admit I am not a telecommunications expert, I am just trying to boost a bad signal in my old house to the 2nd floor. I have the fast internet service AT&T sells, and I have tried other service providers as well. I have tried many other extender brands, and I thought buying a more expensive model would do the trick.