I am trying to get a hold of service. While on vac...

I am trying to get a hold of service. While on vacation my engine warning light came on. Today is the third time I'm calling. Once again, I called today at 8:51am, was told that Tommy will give me a call back in 15 minutes. That he is just finishing up a call. It is now 1:46 PM. Guess I'm not getting a call back again. How many times do I have to try? Not good customer service!!!!!!
Michael