Good morning Carol,
I am very sorry that you feel that we overcharged you for your air filter. I assure you that was not the case. Your New Hyundai Santa Fe actually takes a special air filter. It does happen to be slightly more expensive than you are used to. The new design by Hyundai encorporates filter locks that are unique to your vehicle.
I see that you previously owned an older version Santa Fe. The older version is a simpler design and is less expensive. The new locking design costs a little more than the older type. We appreciate your business and look forward to seeing you in the future.