McDonald's

I went to the Mcdonald's on 939 Dillon Rd Superior Co. Approx 7:30 am on 10/17. I went thru the drive thru. I asked the lady why I was being charged .25 cents for a bag. I ordered a breakfast sandwich. She said this is the only location that does this. I told her not to charge me and she said she had to. She refused to take my credit card and would not give me my food. I told her I was going to make a complaint to the corporate office. She said I had to come back when her manager was there to get the #. She said "really it is only .25 cents." I felt she was very rude and she said I was holding up the line and she refused my service. What is next? is Mcdonald's going to start charging for ketchup? Mcdonald's is deceiving people. There is no information about this charge except the small sticker on the drive thru window which i did not see because she had the window open. I will not be going back if they continue the charge. Why is only this Mcdonald's charging and no other location is? I feel more people need to know about this charge.