After a public complaint about my driving of company vehicle and no investigation by employer on complaint I was terminated from my job after 9 years no other complaint is this unjustified termination?

In order to prove just cause to terminate employment, an employer would have to be able to prove serious misconduct, and it has to be so serious that there is no way that the employer could continue employing you. After one complaint, and no investigation, it is likely that the employer would not be able to prove that. Give us a call to discuss your matter further.