won't go in setup mode

I changed my wifi company yesterday, so of course the cameras disconnected. I have worked ALL DAY TODAY to set up the cameras again with the new wifi and can not. I deleted them to add them again because it wouldn't allow me to simply change the wifi. I was only able to add 1 camera. The camera won't go into setup mode, I have restarted them, unplugged them, pressed the button on top, everything the app suggested. The light blinks once it's turned on and nothing else. Idk what else to do. Idk how I got one camera working, and can't get the rest. Please help!!!