Why claim to buy cars with no actual interest to purchase the vehicle

Firstly, I would like to say that I'm not the type of person to complain however, I am Not impressed with the service from we buy cars at all! The process of SELLING my vehicle has required maximum effort from my end so far which I don't think is what the organization promises I offered to sell my bakkie on the app... The app is not updated so it only allowed me to select 2006 model when my bakkie is 2008. This created an incorrect valuation of my vehicle. The agent then called me and I told him this, he then called me back the next day after I received another estimated value which is BELOW book value,however, I asked the agent to come and view the vehicle and we can decide on the price The agent then could not accommodate the times I was available and told me he is working on Monday 17th June 2019, I agreed to meet. So then I waited the entire public holiday, canceled whatever plans and waited the entire day and the agent did not show up, no call, no message. I tried to call him and he did not answer, messaged him and he did not respond. I'm still waiting for the agent to contact me! ..... Extremely disappointed in an organization for making promises that they cannot keep.....