300% commission for 30 days

Rawson Northriding are a bunch of *********** ******. My tenant's lease agreement was coming to an end on 30 June 2022. Some time in May or April, they asked if i was willing to renew his lease and i said yes. They then came back to me with their proposed new rental for the tenant which i rejected and proposed my new rental to the tenant. They never came back to me to let me know if the tenant was happy with that amount of not. It is only when i asked about this matter on the 13th of June that i was then informed that yes, the tenant had agreed to the new proposed rental and Riana attached a new lease on the email. When i went through the lease, i released that i was not happy with their new terms and consequently informed them that i am not interested in renewing the lease anymore. They told me that the tenant will have to move out by 31 July 2022, which i agreed. The commission they charged me for the extended 1 month of July went from R350 to R1000. When i called to ask why their commission for 30days went up by more than 300%, the lady who i actually deem rude mentioned something about their system being programmed to send new lease agreements on the 2nd week of June. My argument is simple, had the lease was sent to me towards the end of May, I would have enough time to go through the document and come to the same conclusion; therefore, no extension of a month needed. When i agreed to the lease renewal, i had no idea that there would be new terms that will lead to my cancellation of the mandate, but they knew themselves that they will put new clauses on the agreement aimed at enriching themselves with my property. As it stands, i have not even signed any documentation for this one month's extension yet they have taken R1000 to manage my property for only 30 days. And how is it any of my business what they have programmed their systems? Why is their system not programmed to sent out renewal of lease agreements a month before the expiry of the old one? it is to trap poor clients like myself. This is **************** and this Riana lady actually laughed at me. That just goes to show how insensitive and inconsiderate she is. It is my property and they have no right to rip me off this way in these trying times. I want the CEO of Rawson South Africa to help me understand that this is how Rawson works? Design systems that sent lease agreements late only to disadvantage poor citizens like myself.