hotwire hotwire.com changed prices for car rental in the middle of the transaction Nationwide

at the beginning of my transaction i was looking at 14.99 a day. then as i navigated through to the end of the reservation process i saw i was charged 18.99 per day. (charges not related to taxes etc.) customer service refused to refund the difference despite the service representative confirming the rate was in fact at the time 14.99 per day  hotwire runs a scam for car rental, where their computer system quotes a price then on the next screenshot raises it a few dollars figuring the the customer will just pay..its only a couple bucks a day. if you check again from another computer the first lower rate will likely remain. continually checking from the the same computer will result in a higher price.(their system can see your computer or smartphone's cookies) I recommend checking prices with hotwire as a reference and the maybe try somebody else like priceline to beat their price..their customer service is awful and in the Philippines or something.