Dollar General review: denial of restroom access to a 3 y. o

While taking my 4 grandchildren shopping at the store my 3 y.o needed to use the restroom I asked the clerk for the key and she said that they dont have a public restroom, my granddaughter was very uncomfortable and had began crying, I've shopped here for 3 plus years and have in fact used the restroom. Needless to say I had to leave my cart upset the other children who were shopping and leave, mind you I am a grandma so the stress was definitely high, during all of this I lost $20 which is upsetting but my loss none the least, I announced to the employees that I intened to call corporate, I was then told there was no working bathroom, the children love to shop there but I have been doing online shopping due to problems like this. I do not believe your chain operates with out restrooms, most of your stores are very welcoming to bathroom facilities, also i do understand denying use to suspicious activity of some patrons, a 3 y.o having to use the restroom on themselves in 20 degree weather does not constitute denial.