Warranty Repair - 6 weeks and waiting

Samsung ATIV was logged for repair under warranty on 26/06/15 (job JC ***9). I was advised that it was ready (after I phoned in follow up) and was collected 03/08/15. As there was no WiFi at the store to test, I tested at home and found Windows was not activating so returned to store 06/08/15 (job ***6). On trying to follow up today 14/08/15 I phoned Woodmead store where the phone rings for about 3 minutes and then cuts out or is hung up (this was tried 3 times). I then phoned Customer Services : *** at 09:10 and receive a recorded message that they are out of the office at present! This is seriously wasting my time and highly inconvenient to my work.