Delonghi Coffee Machine - 3rd repair in 9 months

I bought a coffee machine at HiFi Corp on 23/08/2014. On 18/11/2014 I took the machine back as there was quite a few things wrong with the functions. Machine was sent in for full service and I received machine towards end of Jan 2015. On 14/04/2015 I had to take the machine back again and complained that I thought I bought the best coffee machine on the market. I explained that I only used the machine for about 5mnths in a 7mnths period. I requested a replacement and not another service as if I have this much trouble within the first year, how much trouble am I going to have after 12months. The technician at HiFi Corp called Delonghi, but was told that he should send the machine in for repairs again.And now 30days after I received the machine back, there is something wrong again! Every time it is something else. At first I couldn't make espresso, it kept on asking that I should insert the milk container, the ground coffee kept on falling through to the bottom, etc. Then it didn't want to make coffee using coffee beans. Now it does not want to make long coffee with grounds coffee. I try to test all the functions on receipt, but it is as if the functions disables when not in use.