dispute technician charge

I am disputing a $100 technician fee added to my account. My self-installation failed because there was no viable Xfinity line running into the house. The technician had to perform external configuration, which included removing an old AT&T line and running a brand-new Xfinity drop cable to establish service. Under Comcast policy, tech fees are waived if the work is done on Xfinity-owned infrastructure outside the home. Please review the tech notes confirming the line replacement and credit this fee back to my account immediately.