Charged for something I didn't buy and was treated...

Charged for something I didn't buy and was treated like a criminal... it was a simple annual flower. I bought 2, they charged me for three. Noticed the mistake when I got home and it wasn't a big deal. I was heading back down to the store anyway to return something else, so I mentioned it to the cashier. He needed to grab a manager and insisted of coming over to find out the details or apologize for the inconvenience, the manager ignored me and said she would have to check video surveillance of the transaction... this is a $5 plant were talking about! Not a $5000 gold watch!!! Check video surveillance for a $5 mistake. So, I was left standing there for 20 minutes while they verified that I was telling the truth. When she got back she argued with me that she I was in the wrong. Standing there for 20 minutes waiting for her wasn't even worth $5 of my time! Why would I hatch a scheme to steal a $5 plant? As it turns out, thay had charged me for the correct number of plants, but rang in the more expensive plant for a lesser plant, so either way I was charged the incorrect amount and paid more than I should have and was made to feel like I was in a criminal investigation over a petty $5. The customer service from this rude manager was appalling. 4 generations of family shopping at McGucks for decades, we will never shop in their overpriced store again. You just lost loyal customers.