Fan PIN

My girlfriend and I went to AT&T a couple of days to go to get on our own plan. It wasn’t until yesterday that we go everything off of her moms plan and switched to our own. With that being said, the place we went to types in the wrong email address, so we have yet to receive any emails regarding our account information. She hasn’t been able to sign onto our AT&T account and check our bills or anything. What should we do?