Help. Xfinity won’t remove lines

I moved to a new house and wanted to use Xfinity. The technician came out and he installed wires with a lot of slack stretching my whole backyard and going into my neighbors yard. This was done without asking for my consent or letting me know he was even going into my backyard. He only informed me while leaving there was “a wire in my backyard that would need to be buried”. I told him I didn’t consent to wires or him in my backyard and he had to remove it but he refused and left. 

I called Xfinity immediately and said I want the wires removed and to cancel service as he trespassed and I did not consent. Xfinity said if I cancel service the wires will be there forever, and they said someone would be out to remove them within 24-48 hours. No one came. I called after that time frame and was told someone would be out today between 2-5. No one came. I called again and they said again, why don’t you bury it and advised it can take up to 30 days to remove, even though it’s a hazard ticket. 

i didn’t consent to this in the first place, it is a safety hazard for my kid and my spouse fell on the wire.  Whenever I call they say someone will be out but why not keep service and bury lines, and they are threatening if I cancel service I won’t get it removed so I’m forced to keep service. No one comes. 

How do I get these wires removed?