BAD SERVICE EVER

We bought a grass cutting machine at game in Jeffrey's bay on the 23rd of March 2019, we took it back to the store on the 3rd of may due to machenical problems. They promised to fixed it within 21 days or they will give us a refund. I visited their branch on the 25th of May to just to check if there's any progress, I was advised that they're still busy fixing the machine someone will contact me on Monday. They called on Monday and said they have fixed the machine. I asked them to make sure that's ready by Friday 31st May 2019. I went to the store today to collect the machine, I was advised by the manager and cashier to wait for the sms. They won't give me a refund, The machine is in Cape town they are waiting for a truck to come and deliver there is nothing they can do. They are so unprofessional and *********.