Address Unserviceable - Rural Location

I have been trying to get service installed at a new house which is situated about 800' from the road where the Comcast drop is.  We have a building out by the road which has had service before which I could have Internet installed at and then run airFiber or long distance AP from there back to my house, but I would much rather get full service including tv, internet, and voip at the house.  There is direct LOS back to the house as the utility poles are run back here and DSL is currently running back here.  A tech came out and said they could run the line back here, but when we call customer service they say it is unserviceable.  I have also talked with another tech in the area who said they don't have a survey team but he would go back and talk to his supervisor and construction team to see if they will come run it.  Can I get some assistance from an official employee to help me investigate this further?  Thank you.