Broken Geyser

I logged a call with Absa Home insurance about my Geyser having no hot water. On Friday 9th Oct I received a call from Derrick advising he will be at my premises before 6pm. No-one came. I called DJK Investments the following day and Derrick answered. Very Abrupt and Rude, Derrick advised me that I need to go to my parent house in the interim as he is too busy and cannot assist me. I was absolutely shocked at his rep****. When I advised him that I cannot go without hot water for the weekend , Derrick advised me it's my problem not his and I can go and lay a complaint with Absa because he just don't care. It Monday the 12th and my Geyser has still not been fixed.