Defy Won't Service Its Appliances

I bought a Defy tumble dryer 2 years ago. The heating element on it has gone out twice - most recently in early February this year. It is mid-April, and I have been unable to get a service technician to come to my house despite over a dozen phone calls. Yesterday, at long last, I received a call from the Defy Service Centre telling me that a service representative would be over before noon today, and that I would be charged R690 for the service call, which I must pay in CASH. It is now 1:30 pm. and the service rep has not shown up. During my several calls to the service center today I have (1) been promised a return call from the service tech, (2) been promised that the service tech is coming; (3) been told that I did not actually receive the call I definitely received yesterday; (4) been told that I would have to wait 3-5 days for a service call; and, (5) been put on hold and hung up on 3 times without ever speaking to anyone. None of these calls has provided me with the information I have requested, which is an estimate of when to expect the service tech to arrive. Bottom line, I can't get my appliance fixed, and Defy obviously could not care less.