SMD POLOKWANE do not want to replace the computer boxed was ****** from the car that was at their place

On the 9th of July my mom had an accident with toyota auries and the car was towed to SMD POLOKWANE, Monday my mom went to fetch the car and now the car does not have computer box, they do not want to replace it so we can have the car, their excuses is not their problem, and the always ***** the stuff from other cars. i am the owner of the car Sinah Chuma