We were just going to let everything go after talking to the superintendant for the builder. He must have mentioned something to the foreman.
They came out and removed all of the wall that was over our property line with a jackhammer. The foreman for the job (someone we hadn't spoken to) was pretty upset with the crew as he showed them what happened. He said they poured the bottom of the wall without using a "form" and that things didn't go quite as planned.
He came over and said he was very sorry and that never should have happened. They were putting up more of the wall today and he said that they will make sure all the dirt is level and he is going to bring his sod guy in to repair all the grass.
The new owners came over last night. They are very nice and wanted to make sure everything was fine.
A happy ending.