Lack of communication, integrity and honesty during an application for a rental property

I enquired about a garden flat for rent on Property24 as wellas via WhatsApp. On Monday morning, the rental agent, Mariska Swannepoel, contacted me to confirm a viewing appointment for Wednesday at 15h30. After receiving no further communication, I reached out to her on Wednesday morning to reconfirm the appointment and request the physical address. She stated that she was busy finalizing other appointments and would get back to me via WhatApp. By 15h00, having still heard nothing, I phoned her directly to obtain the address, which she then provided. She also asked me to reschedule for 16h10. However, due to light traffic, I arrived at 15h45, only to find no one else present. Mariska later claimed she could not locate me on WhatsApp, but upon verifying her number, I discovered an existing conversation with her dating back to 2022. The property itself was in poor condition: the garden was neglected, the main bedroom cupboard was hanging off its hinges, and the front sliding door was extremely dirty and appeared unused. After the viewing, Mariska requested that I send her my email address via WhatsApp so she could forward the application form. I eventually received the form at 22h00 on Thursday evening. I completed and returned it the following Friday morning, asking her to keep me updated on the approval process. By the next Wednesday, still without knowing it the application was approved, I included the agency's Director in my email. Only then did I receive a prompt response confirming that my application had been approved, but that it was now pending the owner's approval. Yesterday (Friday), I asked for clarification regarding the owner's approval process, as the duration was taking longer than expected. This morning, I was informed that my application had not been approved by the owner. I have received no proof of this decision-only the agents word, which raises concerns about her integrity and honesty throughout the process. Mariska then asked me to send her my requirements for the type of property I am seeking so that she could further assist me. However, after responding to two other listings on Property24-both of which she manages-I have yet received no reply from her.