CANT COMPLAIN ABOUT SERVICE BECAUSE THERE IS NO SERVICE

I booked my vehicle for service online and received confirmation that someone from the dealership will call me back. 4 days later I still have not received a phone call from the dealership and when I decided to call to find out when I can bring my vehicle in since they did not call me, I was told that I can only bring it in next week because they are fully booked. Does it mean that I must wait 2 weeks to get a service booking with Nissan Centurion. I really find their lack of customer service pathetic. Now that they have my money they don't care because they are targeting new customers. This is the second frustrating incident with Nissan. In 2015 my brand new Qashqai deployed airbags although it did not have a single dent, after I went over a pavement. Nissan took my car to a backyard mechanic who kept my car for 6 months. For half a year the mechanic failed to install airbags. Other people said Nissan should have given me a brand new car because they gave me a faulty brand new car. I will NEVER EVER BUY A NISSAN AGAIN. If you are contemplating on buying a Nissan, do yourself a favour, DO NOT BUY NISSAN.