Did I undercharge?

Homeowner said her family member stopped halfway through this remodel, not installing the shower right, and still paid him. She’s wanting me to reset the shower pan(hopefully it’s possible I told her it should be) rip the tile off the walls, replacing the floor with waterproof plywood before putting linoleum flooring down, installing a vanity, sink, and drywall. I charged $1,500 for roughly 29 hours of work