Ignition Switch problems of the 2002 Hyundai Sonata

My 2002 hundai Sonata blk 4 door automatic. I started to get in the car thurs morning 2/15/07 at 4am. The key in the ignition would not go in. I had the car towed to my local mechanic. He did advice to put a new battery in the car. He said it was time for a replacement. I have been going to him for some time. And find him very reputable in the area. However, the tow man also could not put the key in the ignition. When I picked up the car at his shop the key went in. Battery works great. So the next morning 2-16-07 the ignition would not go in again. I called my dealer and had the vehicle towed there. They said it didn't do that for them that the car was fine. They tried the key all day. They said they would repair the vehicle if the problem occurred at the time of testing the situation there. The car is under a policy of warranty for 60,000. 00 miles. However, I could give them $160. 00 to open up the ignition to the tumbler. I feel that if its under warranty that they should repair the problem. There only suggestion was to tow it again if it persists. I said what if I get stranded, and yes, I have no cell phone. They said just call the 800# anways for tow. So I wasn't satisfied at grapponies in concord nh. So I asked auto fair in manchester, they said the same thing. I think that its hard to believe that the tow man had the same problem as myself. And that we have to see if it happens for them, that they will repair at no cost at that time. When its' under the warranty. My feeling is that both dealerships that are local don't want to eat the part for inventory, if there is nothing wrong w/the chip in the tumbler. So I guess I have to just cross my fingers to make sure it doesn't happen. Grappine did make me a new key for the ignition. So I'm a frustrated consumer in manchester, nh.