Catastrophic support Microsoft hardware problems

I have the unit for more than 2 years. Shortly after the end of support was no longer available due to a hardware defect Wlan. Exchange repair cost 300th Then came again the same error (- there was supposed to in an exchange is not possible?). Then Microsoft promised an advance replacement. After I had heard three days, I sat down in connection: 3 days since the service waits for the response of the experts what to do. So much for the alleged exchange of equipment and the alleged advance replacement.
Fact: Never again Surface.