False advertising and poor service

I bought a car and there has been parts missing in the car and false advertising according to the inspection report. I raised the concern at the midstream branch and they said I should follow the process by opening a customer service complaint on the website. I called customer service with my reference and she said the person who is handling my complaint will call me back. Today I called again and the same thing happened. It has been 48hours after the complaint and no one has called me back. I was also told that they will call me to tell me when the cars permit will be available for collection and that still did not happen I have the car now for 4 days without a permit and a expired license disk. I spoke to the sales man about it and he said I must wait for customer Care to call me. I don't know what to do now? Are they going to assist with replacement of the items or must I replace it myself and accept that this company is not going to take accountability for false advertising