Alternatively you may consider the probability of refered pain from the lower back. The clue is the pain up the leg and hip. In my experiencePlantar Fasciitis is effectively treated by attention to the lower back and gluteal muscles. If all the local treatments to the foot have not worked, my assumption is that the Fascia is not the problem but the pain is another form of refered pain (Sciatica). The refered pain site can actually be painful to palpation, leading to the belief of Fasciitis.
The usual original source of foot pain from the lower back is L4,5,S1. The problem is usually one of long term lower back problems and the inflammation has spread into the Gluteal muscles. The source of the foot pain will be from the extreme lateral area of the gluteals.