Surprise $100 Technician Recovery Fee after a service move

I recently transferred my Xfinity service to a new address and just found a $100 Technician Recovery Fee on my bill. I attempted self-installation as instructed, but the internet wouldn't work — it turned out the cable wiring inside the new unit hadn't been properly connected (an internal line/transmitter issue that was already there when I moved in). The technician fixed it on Xfinity's end; nothing was wrong with my equipment or my self-install.

I was never told during the transfer setup or when scheduling the technician that a $100 fee would apply, and the underlying problem was pre-existing.

It's almost 3 times the price of my monthly payment.

I'd like to request that this fee be waived. Could someone from the support team take a look? Happy to provide account details privately.