Reversal of holding deposit not happening!

Despite a very good review on the Booking.com as well as Green Motion Car Rental review, I now have to reach out to Hello Peter as I am not happy with the service I've received after I've return the rental. The initial good review was as a result of a great experience when collecting and delivering the vehicle, as well as based upon great value for money. HOWEVER, despite returning the vehicle on the 21st of January, I am STILL waiting for my holding deposit of (R9000!) to be refunded. (Fuel needs to be deducted, but no other damages reported, hence the reversal of the balance should be a straight forward transaction. I contacted Kenings on the 26th of Jan and Thokozile responded as follows: Good day Mam Your refund request was sent to the head office this morning and as soon as they have processed it, I will send you the proof of slip. Thank you Regards, Thokozile

One week later, and I still have not heard from them - I will definitely never make use of their service again! But in the meantime, I really want my holding deposit to be reversed!! Also, I am very annoyed with booking.com (booking was made via them) as according to their website I need to address the issue directly with the rental company - then why act as a booking agent, taking my money!!!