Family Dollar complaint: Damaged product and incorrect charge for merchandise

On October 4 I purchase over $77 worth of merchandise, not including tax. When I got home, I found one of the Minute Maid fruit punch is that I had purchased had a leak at the bottom of the carton, and there was fruit punch all over my trunk, and the rest of my purchases. When I looked at the receipt to get the phone number of the store, I also noted that I was incorrectly charged for the two 12 packs of Dr Pepper that I had purchased. They were supposed to be two 12 packs for $10 and I was charged $7.95 for each 12 pack.
I returned to the store, less than 10 minutes from when I had left and I explain the situation an employee who was standing outside the door, smoking a cigarette. When I explained the situation to her about the fruit punch and showed her the bag and the leaking carton, she just shrugged her shoulders and continue to smoke her cigarette.
I went into the store and grabbed another Minute Maid fruit punch and brought it to the front register , to the young lady that had run me out. At this time she said to me, “you cannot take that an exchange. You already left the store with it.” I told her that I brought the Minute Maid fruit punch carton back and that I could show her that it clearly had a leak at the bottom of the carton. She said “it doesn’t matter. You already left the store so you have to pay for another one if you want it”.
I told her that I wanted to speak to a manager, and she replied “I am the assistant manager, and it’s not going to change anything.” When I asked her for her name, she replied “Michele. Do you want me to spell it for you?”.
I was so upset that I did not even bring up the over charge for the Dr. Pepper 12 packs.