Hippo SPs are unprofessional

I did a car rental through Hippo. i chose the deal, which was the through Bluu. It opened a link by rentalcars.co.za and payment for the deal, i entered my card details and payment went through. I was given a reference and proceeded to the Bluu at OR tambo international. I got there, they would not accept my fnb card (the one i used to pay with) for the deposit, my absa cheque account, they had a policy of not accepting absa cheque accounts only their credit card and capitec savings accounts. It is their policy, I understand. Nothing I can do, these are my cards. I say i cannot proceed, can i have a refund, they tell me to contact rentalcars. I send an email, rentalcars do not repond, they direct me to a portal where i need to enter details and now refuse to refund me. This was not my doing. I opted to pay cash, deposit the money or even allow them to take double but they would not accept my card and now my rental booking money has been wasted. Rentalcars refuse to pay me back. I need for Bluu to send them an email stating what has transpired.