Family Dollar review: clipped coupon and price on shelf different from price ringing up

First I purchased item and it said 2.00 on shelf but at the register it rang up 2.25. they took the 23 cent off and the manager told the cashier to change the sign and then when I clipped my coupon the cashier was so busy talking did not let me finish putting in my number then wanted to put it back on my card but I have had item put back on my card to see later that I was charged again and I never got that refund. this store is so bad people started leaving stuff and walking out. I will not shop here again and I will be telling family and friends not to shop their either