Trouble clearing a sewer.

A few days ago I got a call for a stopped up drain, the customer called me back after a few days to come and clear it, Her husband tried but could not clear it. Anyways the toilet was already pulled and I could not locate a cleanout in the front yard. I brought my Spartan 300 into the bathroom with 55 mag cable and a 2 1/2" cutter on it. I went in through the toilet flange and thought every thing was ok? Unfortunately my cable went up the vent and got caught. It took quite a while running the machine in forward and reverse to finally get my cable out. Well my cable had some insulation wrapped around it. My guess it there was an opening in the vent in the attic and my cable went out the opening into the attic and twisted up in some insulation. The small camera would have been quick to check the vent from the roof to look for a hole in the vent. I did not want to try again from the toilet flange so I went up on the roof with the K60sp and tried to clear it. I was out about 100' and was not able to clear it ran into a root stoppage that stopped the K60 and even caused it to run backwards when there was a lot of torque on the cable. I gave up after about three hours.