Casey's review: refuse to service me

I went into the casey's general store to buy some merchandise. Walked up to the counter to pay and the employee named stephanie said she wasn't going to service me and walked out of the store to smoke a cigarette and started using her phone. I then waited about five minutes for service. Finally I walked over to the pizza part of the store and asked if she could check me out she did. That was by far the worst service I have ever had. I am a regular customer, I hope no one else is treated like this. No employee should have the right to do that and get away with it. I am very mad, I would appreciate it if you could look into this for me. Thank you for your time