What did this so called mechanic do to my car?

[Tieundra]

Had transmision rebuilt in 03 dodge neon, now reverse doesn't work, it shifts really hard when i pull off, recived a multitude of codes after having it diagnosed.. p731 p736 p1790 p344 p0700 p051

 

[not 2 B fooled]

Take it back to the mechanic