From Melbourne to Adelaide

Extremely poor experience. I was attended by a Chinese staff member when renting the car in Melbourne. I confirmed the return details multiple times, and she emphasized twice that I only needed to return the keys and nothing else. I purchased all the recommended insurance for safety, but she told me I didn't buy roadside assistance. Later, QEEQ confirmed that roadside assistance was included in the full insurance, and I ended up paying an extra 25 AUD due to her misleading information. QEEQ mentioned that the personal insurance I bought through them wasn't visible to HERTZ, which was odd, especially since the Chinese staff member claimed I had purchased all other insurance except roadside assistance. When I returned the car at Adelaide airport, I provided the final refueling receipt, and the tank was full. The staff there just let me go. However, they deducted a pre-authorized amount of 168 AUD on the same day. I immediately called QEEQ, but they were confused too. Four or five days later, QEEQ sent me a HERTZ invoice charging 306.91 AUD, claiming the car was dirty with sand, requiring a steam clean for 180 AUD. We were five women on a road trip, and we kept the car clean, sweeping it daily. How could there not be sand on the Great Ocean Road? Why didn't they mention any of this when I rented the car? They also charged mysterious management fees and service fees! This is clearly extortion! I complained to QEEQ again, but they told me to wait. Eventually, HERTZ deducted the money directly, and QEEQ provided no solution even after a month. It seems they washed their hands off once the money was deducted! I'm utterly disappointed with both QEEQ and HERTZ! Future renters, think twice...