Why am I getting charged $100 installation for your bad cables?

I recently requested a transfer of service. It should have been as easy as plugging in my equipment and activating the service in the new house. Not the case at all! After spending two and half hours on the phone with support, which btw takes you an hour to get to a live person, the service could not be activated and they had to send a technician. Once the technician gets here, they discover the cable in place was bad and had to replace with a new cable. This is your equipment that went bad, not mine! I should not be charged for you fixing your own cable! On top of that, I was lied to by you guys on three fronts, they said they will submit a ticket to get another company out to bury the bright orange cable I have running around my house. Three weeks later, not a word. I have contacted support multiple times about this and no resolution, nobody has scheduled to come out here and bury the cable. Secondly, I can never get close to the speed that I am paying for. It's ridiculous to get speed test results a fourth of what you pay for. The technician said to give it a couple of days and the speed will increase. Again, three weeks later and it has gotten worse. And thirdly, which is the worst, I was told the $100 will be removed from my account and then put on hold. Transferred to the automated voice technical system and a week later still have the $100 charge on my account. Your support is horrendous as nothing gets resolved and they just keep transferring me to voice automated services that do not help but send reboot signals and call backs which come in an hour later. Then, support tells me its $810 dollars cancellation fee when I am 100% sure it is not. This is absolutely ridiculous and I will never be using Xfinity service again after this contract runs out. Extremely frustrating on all fronts!