Complain of car rental

Very bad, i accessed avis car rental link to rent a car, i was asked to enter my bank details of which i did, R485 was deducted as deposit, upto here all was well until i recieved emails from car flexi detaileilimg the amount paid and the balance, there was avis logo on the pictures of the car, on my travelling day i went to avis to collect the car and pay the balance, avis knew nothing about them and could not access the deposit i paid, i tried to call car flexi on the spot and could not reach them from the numbers i got from their website, i wrote them an email same day, they respnede my email and say they cant pay my deposit even if i did not get the car since i did not call the to cancel, isend them my call log showinh i have called 6 times