CUSTOMER SERVICE? SAMSUNG POLICY?

Note 2 booked in on 27/01/2015 for various issue and has been back for the same issues for the 4th time. Software was reloaded. Unit tested ok. Returned same day, same problem. Replaced Main PCB and reloaded software. Unit tested ok. Booked back in the next day Rewrite IMEI, Repeat repair. 4th time - phone rebooting. No feedback forthcoming. Sent msg via Twitter to Samsung. Received phone call, matter to be taken further. Agent called a few days later to inform me that no issues have been found but she would have the unit collected and taken to head office to be tested by technician for 2nd opinion. No further comms from Agent. I called twice, Agent never available, asked to speak to a Manager, was put on hold for 30 mins (pic of timer on phone taken and send to Samsung via Twitter). Response: send your query to email address. Call head office and ask to speak to a Manager. He will take it up with the appropriate office and get back to me. Receive a call from same agent, the technicians have found a problem and are replacing the board - again. Phone was taken in under warranty - 2 year warranty expired on 4 February 2015. Phone still with Samsung - 3 months later and no feedback.