Help! Roach infestation problem?

My husband's grandmother rented out her old home next door to a family who obviously didn't know how to clean or be sanitary. The outside looked like a garbage pit and they were falling behind on rent so she finally evicted them. Because of physical issues, she was not able to go into the home throughout the time that they lived there to see how they were keeping it up. The day after they moved out we went down to "clean". We had no idea what we were walking into but let's just say the outside looked better than the inside. There was trash and dog feces all over the floor (a dog they weren't supposed to have) along with a multitude of every kind of insect you can possibly think of. They also had two small children living in this! We got all trash out and pulled up carpet hoping that would help SOME. Now we still have a roach problem. There were so many roaches that the kitchen counters, walls, door handles, molding and cabinets are all black and brown from roach feces. We cloroxed everything we could and fogged the house with 9 foggers two different times. We still have bugs. What is going to be the correct steps in getting this house completely rid of this insects? Thanks for all your help!