Xfinity is scamming us

We are being charged $22 every month since October 2025 for Xfinity mobile even though we do not have a mobile account. We call Xfinity, they say it’s fraud. We call the bank, the confirm it’s coming from Xfinity. We tell the bank to not authorize the payment, Xfinity sends us to a debt collector. We call Xfinity, they have no record of this charge occurring. So how are we being charged from Xfinity when Xfinity has no record of us owing when we call but as soon as we don’t pay it then send us straight to collections? Any help?