AVIS FAILURE TO REFUND

I returned the car on 16 April 2018 as agreed. I was told that i will receive the refund on 24 April 2018. Now i call Avis and I am told that payment has not been processed, despite the fact that Avis had my account details all along. I am advised that it will take 6 working days for the money to reflect into my account which is unacceptable. I need the money reflecting in my account on 24 April 2018 as previously advised.

Please note that i dont want to receive calls from Avis apologizing, i want funds to reflect in my account as agreed. I called customer care and my account details were confirmed.