Can I sueCan I sue if I was accused of putting an item in my bag?

I went to a store to return an item and I had a receipt. The customer service lady told me that I couldn't get a refund because one of her co-workers saw me putting the item in my bag. I had my two children. I have never been humiliated. After throwing words back and forth, they have me my money back. The lady that accused me said she never told the cashier that. This is my neighborhood store and I have been going there for 10 years or over. I'm so disappointed.