How do I get my insurance to pay for foundation problem cause by a lplumbing leak

Bought this house 3 months ago. Started noticing cracks forming and doors not fitting. House was inspected. Found out there is a pipe issue and this is an area with shifting soil. People have told us that the ins co will say the shifting soil cause the pipe problem and the foundation problem. The fellow who looked at us told us the leak caused the foundation problem. $35000 to fix.