I think he means that they over charged him $130, then the next day they refunded the money to him.
This happens at my work quite often, if you are overcharged they will just refund you the money.
Also, if you arent charged enough, if we notice we will just put it through on your credit card anyway. I work at a hotel and heaps of people leave and forget to pay for a breakfast or a few drinks etc, so you just charge them, even if they arent there to sign the receipt.
So you are saying you want to sue them for nothing? You have your money, are you claiming for pain and suffering or something?