Family Dollar complaint: Employee harassing me

The assistant manager Kristina that works at the family dollar located in our small town of Mercer Pa 16137 has been using her employment at Family dollar against my family and I. We live in a very small town and Family dollar is somewhere I shop on a daily basis! My 10 year old child was I guess “dating” her daughter whom is the same age. It is very silly and immature to me but they broke up. She is harassing him (and our family in general) at his baseball games. To the point the coach has threatened to call police if she does it again. She has messaged me privately Multiple times saying I am not allowed in the store even though I have not done anything at all especially in her place of employment! I just buy my stuff and leave. Today she refused to check me out and the awesome manager Chris whom was there told her “you need to grow up” and checked me out and was very kind! He said I am welcomed but I am worried that if he is not there she will embarrass me and not check me out while I also have my children with me and they witnessed this today! It was very unprofessional and I’m not sure what else to do. Please contact me at (724) 967-6262 or email [email protected] my name is Jessica Simonetta. I really would appreciate any help!