There may be some confusion on the details related to your vehicle. The vehicle came in for a check engine light. We found the oxgen sensor and thermostat needed to be replaced. This repair was declined. Supplimentally, you requested we replace the headlight bulb. The vehicle required a HID bulb (L0000D3S). We shared upfront this is higher cost bulb and was different from the bulb you had purchased. We provided an OE grade bulb and charged you list price for the bulb. It is very common in the repair industry for a diagnostic fee to be assessed for a check engine light. We are very sorry you are frustrated with our estimate. Please let us know if you need our help in the future.