Unable to reach a live agent about my Xfinity Mobile bill

Hi, I've been trying to reach a live agent through Xfinity Assistant, but I haven't been able to connect with anyone.

I also have a question about my Xfinity Mobile bill. I was previously paying around $37.75 per month including my device payment, but now that my phone is paid off, my bill has increased to $80.50 just for the mobile service.

Could someone please help me understand why it increased so much? I would prefer to discuss my account privately through Direct Message rather than by phone.

Thank you!