Xfinity Mobile service is unusable in my area - need account and cancellation assistance

I recently transferred my existing phone from T-Mobile to Xfinity Mobile. Since the transfer, my mobile service has been extremely unreliable. My phone mainly works on Wi-Fi, calls drop, and when I leave home I frequently have no usable cellular service.

I have already tried live chat support, but the chat disconnected before my account and cancellation questions were resolved.

At this point, I need help reviewing:

• whether I have any contract or commitment
• any cancellation or early termination fees
• any credits available because the service has not worked reliably
• what is required if I decide to transfer my number back to T-Mobile or another carrier

I brought my own phone from T-Mobile and did not purchase the device from Xfinity.

Because my mobile service is unreliable, I need to handle this through written support rather than by phone. Can an Xfinity representative please assist me by direct message?