I just got a chicken sandwich from Wendy's that was hard, what should I do?

It was an ultimate grilled chicken breast...it was hard at the bottom, like it was completely dried out and sitting around all day. I took my first bite and a big piece of the hard bottom basically peeled off of the rest of the chicken and I had to peel it off the piece I was eating. It wasn't bad or anything, just completely dried out at the bottom. I'm so pissed off and they close in 10 minutes, I'm not driving all the way back out there in the freezing cold. So what should I do??? I want my money back. =(