Family Dollar complaint: money dispute

I went into this Family Dollar on August 25 2021 to reload money on my card…I gave the cashier a fifty dollar bill and 4 20 dollars bill . I wanted 110.00 Dollars loaded on my card…The cashier wrong it up as i gave her 120.00 which actually I gave her 130.00….A 50.00 dollar bill and 80.00 in twentys….when she gave me my reciept by the time i got to my car i notice what she did..I went back into family dollars and she call the manager..I told her how much i gave the cashier…The manager told me that they could not go back into the drawer and count the money..I told her to look at the cameras..They refuse The manager told me to come back the next day after they count the drawer, and if it come up short then they would no…They also kept my reciept… I went back the next day and they said they couldnt find nothing wrong…..They refuse to look at the cameras…They refuse to even go back in the drawer to check..