I'm actually dead East of Mt. Carmel Rd. It goes right beside Camden Governor's Village where I live, more or less the western boundary of it. North boundary would be Whipporwill, branching off Mt. Carmel Rd to the east, and South would be Governors Drive, branching off Mt. Carmel to the East. Governor's Drive is where the Food Lion is (and they don't have service there either.)
I too live in what Verizon calls a marginal service area. They will not do anything about it though I live about a mile from their tower. I have gotten all sorts of excused like "it is caused by your microwave even when not being used." A network extender does not work in my home because the window I have to use in not in sight of the tower. If I could get better service from another company I would ditch Verizon in a flash. They do not care about the customer, but about the bottom line. Also, a network extender gives you VOIP. If I wanted that I would not have to us Verizon for it.