Impractical and inefficient waterproofing

10 years ago,SBS said they could fix our waterproof problem. But instead of redoing the flashing, they redid the entire flat roof, an expensive exercise. However, the problem of the leaks around the edges was not solved, and we continued to suffer with water dribbling down the walls. They recently came to do a follow up, and finally agreed that the original job as not well done. But I am still waiting for follow up...