Just moved to new apartment. Cant access Xfinity App. I also have no wifi

I just moved and done the transfer. They even offered me doorbell and security camera which arrived to mail. They also sent me another modem. I tried fixing it with a customer support. I dont know if anything was fixed cause he seems overwhelmed. He asked me to unlink old address, gave the new address. He also told me my old modem is no longer needed so he asked me the codes under the new modem. He told me it’s good now and I just have to wait 30 mins to 2hour. I let it sit for almost the whole day, thinking I have my wifi now since I can see the set up name on wifi list to connect. I am able to log in with xfinity website but still cant log in on app. Upon further checking, I realized I have no wifi and is actually using my mobile data. I tried calling again but they are closed. (Also their robot assistant is dumb as heck) I need help. I dont want to be charge for something I cant use.