I am trying to help a nephew with a basement bathroom problem. Problem-Shower and toilet 5 or less feet from each other and 5 feet from drain stack. Slow shower draining and toilet back up. I have taken off the toilet after having scratched it up with toilet auger. Now I ran auger from toilet it came up in shower, ran from shower it came up in toilet. Still water backs up in shower when toilet flushed. Plunging does nothing, even when I capped off toilet with knock out, and plunged shower. Just a lot of metal and dirt. No flow increase. What next? How can I get the auger to make the right turn towards the main drain..? Thank You for any assistance. I am real close to cutting the cement and putting in PVC.