Absolutely shocking service and Defy uses them as a service provider

I have had the worst possible experience in service. I had to pay R690 for a call out fee of which the technician, took photos in an 8minute job. Thereafter requesting again for me to send pictures. Monday 27 a call for a quote of a part for R230.06. I agreed nothing further, I followed up again a week later, they then added a further R 450. Claiming for wiring of the unit but what has happened with my R690? Then I was advised the technician is to call me on fixing between 8-10am on the 4th June. To date followed up again, they will call. Oven still not fixed. 13h05 no call received still.