Dollar General complaint: rudeness and ignorance

First of all I love your newer stores and usually shop at the new one in Doniphan. But Saturday I went into this one and went to the back to use the bathroom. I went in there about a month ago and the cashier said they had it fixed so this week I just walked back. I am handicapped, my legs are deformed and I need to go to the bathroom every hour. So it said staff only. I asked 2 girls who were working to get the manager to let me in so I wouldn’t have an accident. He came and said it was broken but if it was the girls would have told me. I asked him very nicely to let me use it and he refused. The other stores all have customer bathrooms so I don’t get how rude this man was to me. I said that I might pee on the floor. Not a threat just a possablity. and he said he would call the police. I made it out of the store but had to buy some baby diapers so I could put one in my pants and not wet myself. This is embarrassing but he could have been nice and helped me out. I will still go to the other store in town but never this one again.