Business ProfileforSixt Rent a Car, LLC

I'd like to give zero stars if possible.I rented a car from SIXT Car Rental on Aug.27,24 through ********** for $358.94.I proceed to pick up the car on Aug.28,24 with a Drop-off on Sep.2,24 from *********************,but was told right away by the employee at the pickup desk that I needed a credit card to a company my ************************ he would cancel the ************************ would issue me a full refund..At no point in me purchasing the Rental through ********** did it say that I needed a credit card(*Why even accept my purchase if I would need a credit card?) I Ended up ************************** Fraudulent activity on both *********************************** because Both companies wouldn't let me talk to someone higher up,They Both know that this is an on going issue with multiple people but have yet to do anything about it,Both companies kept telling me I needed to tell the other to cancel the reservation & get a full refund but both just keeps giving you the runaround.On Sep.8,24 ****** Gave me the money back only after me filing my own complaint with them,but jump to Oct.30,24 I go to use my *********** declining,I find out that on Oct,23,24 ****** was told I have to give the money ********* account is sitting at -$317.43 & is expected to come out of my pockets,because SIXT is saying I received the rental car/*********** I DIDNT.I HAVE PROOF THAT I LEFT THE AIRPORT WITHOUT KEYS TO A RENTAL/PROOF I LEFT IN AN UBER,PAID FOR OUT OF MY OWN POCKETS.WHY would a company lie on a Customer about something that could easily be proven to be wrong.I have PROOF/EVIDENCE of Both companies unprofessional ***************** truly need help on how to get out of this & I don't have money to waste of big companies who lie & steal from people who did every ***** at this time in life.I missed days of work because of these two unprofessional companies,I can't lose more money & time on this craziness.