the rep at Fox Rent A Car tried to overcharge me

the FOX counter staff really tried to overcharge me. First, he did it by selling us gas plan. Then insurance. Then he simply charged on my credit card an amount that was more than what I was supposed to pay. I had to show him my confirmation to say that I only needed to pay $132US. I was charged a deposit of $150US (which is OK because it is a deposit). This was supposed to be refunded to me after return. I just checked my credit card statement. I only got a refund of $18CAD. I now need to contact FOX and Easy Rent Cars to get refund of full amount of $150US. All this is quite annoying.