Kroger

My kroger, here in louisville. I have a kroger perscription card, which has the good rx emblem on it, wants to charge me over 52.00 for a 90 day supply. When I bring up the good rx app up it shows a cost of 20.80 for the 90 day supplyl. I showed this to the clerk and she said she has to charge their price because the good rx price is not a for sure price. They refuse to let me have the prescription for the good rx price. I refused to accept that and left. My name is dawson hawkins. Email is [protected]@gamil.com. Thanks for any legal help. They are using your name but not honoring your price. Doesnt sound legal to me. Let me know if I am right or wrong. I dont have any problems anywhere else. Thanks for taking time to listen to me.