Dissatisfied by Just Property Centurion

I am totally disappointed with the service from Just Property Centurion, they had sent me lease agreement forms and they had said that I must R1000 to renew the lease of which I did that. I had not signed the lease forms and submitted them back to them as I have later then informed them that I actually want to move out of the property that I am currently renting from them. I had spoken to one of their agencies Yolandi Troskie on the 22/02/2023 telephonically and she had said that they will refund or discount the R1000 from my next month's rent and now they are refusing to refund me of the R1000 I had paid to them as, and their reason for non refunding me is that they funds will go to administration costs and I keep informing her what administration costs is she referring to cause I have not signed and sent back the lease agreement forms to them. This is day light roberry and totally unacceptable.