When i moved into my new house a few years ago, I was told that there is no DSL service in my area. I told them that it was BS since the CO is less then a mile from my house (i pass it going to and from work each day) and the dang pedistal was in my front yard. Over and over again..."Sir we don't serve your address/area and have no plans on doing so." Each time i respond..."You put a new pedistal in my subdivision when the road/utilities were layed....want the number off the pedistal?" Them..."No sir since we have no service there...." This went on for three damn months threw 3! different support levels.
Finally, i realized that by law, they HAVE to hook me up if i requested standard POTS phone service. I called, gave them the address, they told me they don't have service there and would have to set up a service man to survey and figure out how to get me phone service where i live. The next day the guy came out and said..."Well this is easier then i thought....you just need a line buried from the ped to the house (50ft). He was done in 10 min. I then asked if DSL was available here. He told me yea, it's just down the road, want me to turn that on too and add it to your bill, i have a new modem in my truck. 20 minutes later....i had 12Mbits DSL service to my house.
I then asked why in the world i could not get this done MONTHS ago. He said that if a address never had regular home phone service, as far as ATT was concerned, DSL was not and never would be available. There system was incapable of turning up dsl before phone service....the computer system would just plain not even allow it.
The next day...i canceled my home phone and kept the DSL
So my advice to you is that get the mandated by law to provide POTS phone line, and then see if magically you can get DSL service now. I would not be surprised if you can now get it. When I told all my neighbors (who have been trying to months like me) how to do it, BAM!, a few weeks straight of ATT trucks at all the houses, and a whole lot of very thankful neighbors.