****** my refund

Im having difficulties in getting this matter resolved. i tried sorting this issue out with customer service and Johannesburg downtown but no one is able to help. i initially booked the car for 10 days but i later realized that i needed to return the car abit early (before the due date) . before I returned the car I called AVIS to find out if I will be refunded should I bring back the car before the actual due date and Nosi from AVIS JHB downtown who later confirmed with her manager said yes there will be a refund due to me, hence I returned the car, even when I dropped off the vehicle I asked and I was assured that I will get a refund for returning the car early and I was also provided with a proof that my refund amount will be R 1 560.00 plus my deposit amount of R2 079.09 to date i still have not received my refund for returning the car early as agreed and as per the documents i received. this is very unprofessional and very frustrating because they are sending me up and down regarding my refund, the Branch (JHB Downtown) saying I have the refund due and customer service saying I don’t have the refund due to me. Im now caught between the in fights of the Avis Branch and Avis customer service, where another employee of Avis says I have a refund due and another employee says I don’t have a refund.I find this very unfair and extremely unprofessional that a loyal customer get caught between the two offices internal matters. i will never book a car with avis agian