The problem is that the leak is not usually where it comes through the ceiling but will run along a beam before it drops. Have you looked in the attic to locate where it came from. I went through what your going through for several years and the repairman would rip up sections of the roof, repair it and when the rain came so did the leak. Rather that replace the roof, I had someone (who is no longer in business), pressure wash the roof, brush the roof with wet cement to fill in all the cracks, prime the cement and put two coats of the elastomeric paint to the entire roof. That was after Wilma and I have not had a leak since. Good luck.