Dollar General complaint: Very Hostile rude employees wouldn’t let toddler use bathroom

We arrived at the dollar general with our 3 year old who anxiously had to use the restroom. We planned on also purchasing snacks for the rest of our road trip. I asked The cashier for the key to restroom she told me the other employee was cleaning it but the door was locked I waited just a for a min as my 3 year old had to go and the lady finally opened door and was very hostile telling us it was her bathroom and still tried to refuse to let us use it and slammed the door in my little girls face and my husbands. We again knocked on the door and she opened the door and told us “we were lucky we’re getting to use it” at this point my child had pooped her pants and was very upset because the lady was hostile and rude and our little girl didn’t understand because she just needed to go the bathroom. So incredibly rude and proceeded to yell at us and she stood outside and smoked a cigarette when we’re leaving. These are public restrooms in the store and part of their job. They have a sign posted on door that says “do not ask for the key if you can’t keep it clean”