ISSUE WITH ERRONEOUS RETURN FEES

HIGHLY UPSET - I was charged $139.86 instead of $43.57 when I returned vehicle which is $96.29 extra fees. Called & your rep 1st tried to say it was taxes & when I explained that was too high b/c my entire rental was only $159, he reviewed it more. Then said it was convenience fee for not refueling vehicle upon return. I don't understand why I'm charged this when the counter rep who rented me the vehicle specifically told me NOT to refuel, that they have an assembly line return & it speeds things up. He even said the gas would be a better price. NEVER did he say this was an upgraded feature that cost money. NOW I wonder if I will be hit with an upgraded fee since the same counter rep said he was upgrading my car since the one I selected was not available. I have NEVER in my life returned a car without filling up but I know he specifically told me Not to & I even remarked to him that I'd never heard of such & was pleasantly surprised Advantage offers this customer service. I am now regretting that thought because I got the worst customer service in that I was SCAMMED. The rep completely Lied & when he said not to fill up. Worse is that I only used $5.50 worth of gas. Booking# 40291187 / CONF# WAD015212EAD for Jaime Sterba