unable to add devices after re-register basestation

I installed the basic security kits with no problem, but the basestation refused to connect to wifi after I moved my eero a few times. I got frustrated and de-registered the basestation and set it up fresh, which turned out to be a big mistake. Now I'm unable to connect the basestation to the kepad, contact sensor, and motion sensor. When I tried to add the devices, they simply do not connect to the basestation, and there was nothing I can do. Please help! Maybe there is a way to remove the sensors/devices and add them back?