We snaked the main line once and it worked for a while. Then it happened again. Then we ran a hose through the main line and it worked for awhile. Now its not working

You have some major blockage in your main sewer line. I suggest that you invest in Sewer Video Inspection to see exactly how serious the problem is. Then, make decision accordingly. Back to you. Milo

When you snaked the main did the snake come back with roots? Back to you, Tom