Makro's insufficient after sales service

We purchased a dishwasher a few months ago - we even have an extended warrantee on it. It has been giving an error on and off for about 3 months already. 2 Weeks ago I phoned Makro to get someone to come out and fix my machine - they took down my number wrong - which I tried to tell the initial operator, I have since phoned many times and have had to correct my contact number every single time and inquired about the call that I was supposed to receive 48 hours after my first phone call and have until this day not received a call from the technicians despite being promised over and over. This is absolutely unacceptable. I honestly have no idea how else to get someone to take me seriously and send a technician out to my house.