Dollar General review: Marni coleman red oak, iowa store

when shopping in Red Oak Iowa Dollar General I experienced the RUDEST person I have ever seen there was an 80yr old lady who ask for help in the food aisle and this lady with name tag Marni Coleman started asking the lady if she was STUPID or something then she said whats wrong with you I cant understand what you want finally she looked at another employee and said see if you can help this old lady I cant understand what shes wanting. I couldn't believe my ears then I find out she is the manager also.
This behavior is unexceptable and from what I hear the employees and talked to just as bad if not worse.
I wont be going back to this store anytime soon and neither will others I tell about my experience.
There needs to be something done with this manager your just gonna continue losing business and that's a shame I feel sorry for anyone working under her management