I just bought a car on Monday. Since we had been ...

I just bought a car on Monday. Since we had been there for 6 hours, which I didn't expect, I was running late for work. I was in a bit of a rush and the man taking care of my financial papers for the car, pressured me into buying an extended warranty. After thinking about it for about 4 days, I've decided to cancel the extended warranty I signed for.
I've called a total of 10 times today. Left messages, talked to so many receptionists. NO ONE has answered my calls or returned my messages....starting from 9am to 9pm....open to close and I've been ignored...I feel on purpose.
Please do yourself a favor and choose another dealership. This place is just awful.