Hello Helpers, I have an external drain pipe that collects the rain water from gutter and drain it to the street. Not only it was broken by the tree roots, its shape was sort of deformed into an oval shape at the break point.

As you can see in the attached pictures, I have digged deep till the point where the drain pipe makes an elbow turn. My questions:

1) I tried to fit the 3-inch diameter adapter into that break point, but due to the deformed oval shape, the adapter cannot fit into. This is a wild idea -- Maybe I can use the low heat of lighter to heat up around the PVC opening and re-shape the oval opening back into round opening?

2) Or do I have to dig deeper to cut off the Elbow, put in a new Elbow? I know this is probably the best solution, but just require more work and time.

Thanks much!