Holy crap, how can that be? You fixed the foundation!!! Where does the crap enter your cellar? I feel really sorry for you and your family Our house is build in a slope. The cellar walls aren't particular waterproof (really sandy) and our sewage system is kind of "old style", but hard to reach. When we have a constipation in the sewer, the ground can get saturated, even when it rains a lot for a long period of time, our ground can get saturated. Happened twice last 10 years. First time was sewer water, with heavy rain, second time was only heavy rain, the day before our holiday I had to convince my wife that it wasn't the sewer.