Xfinity customer service is the worse

Xfinity is a rip-off.
Initially, I used Xfinity internet service. When setting up my personal internet initially, I could do it myself.

Then I moved to a new apartment, they had their own Xfinity internet package, which they said I have to get the technology package through the apartment.

So then, I had to cancel my personal Xfinity service for the apartment's Xfinity service.

To initiate the new service, I faced issues logging into my Xfinity account due to the cancellation of my personal Xfinity account. Therefore, I contacted customer service for assistance in setting up/logging into my Xfinity account. As they couldn't resolve it over the phone, they assured me a technician would be sent to address the issue. Upon asking, they also said I will not be charged for this issue.

The technician arrived, helped me create an account, set up the internet, and provided extra wires that were initially missing for self-installation. Post the service, I was charged $100.

Mind you, I would have been able to set up the service myself if I was able to create a new Xfinity account online (which was an issue from Xfinity’s side) and received the necessary wires for self installation (another issue from Xfinity’s side).

Also, I don’t understand why a technician fee is charged when the issue originated from their end, considering I already pay for Xfinity service every month.

Next, I called Xfinity customer service to dispute that charge. Firstly, every time I call, everyone provides different answers. Some claim it's a valid charge for an issue that originated from Xfinity's end. Others say that it shouldn't be charged, suggesting to open a case for a $100 refund. Some say, the case is active and the charge will be removed for the account shortly. Lastly, when I called today, they informed me that my case has been declined because it is a valid charge for technician coming to fix the problem occurring from Xfinity’s end?