Duty Free on Board

I purchased a Timberland Watch on board our flight from Mauritius - Durban on 7/12/14. On arriving in Durban I went to set the time & the button pulled right out of the watch. I contacted the Air Mauritius office in Durban to ask where I would be able to return the watch for a replacement. I spoke to a Mrs. Aletha van der Westhuizen who did after a couple of reminders email me asking me to write to a Mrs. Brenda Balloo at [Email Removed] I had no response, I then, after a number of frustrated phone calls was given another person to contact, Ailsa on [Email Removed] No reply. I went to Mauritius on holiday on 8th March & when I arrived at the airport I approached the Air Mauritius office there to hopefully get some joy, I was told that due to it being a Sunday the manager was not there & I needed to come back on a weekday. On Tuesday the 10th March I drove from Grand Baie to the airport to get this resolved & was told I could not see the manager & they could not deal with returns from duty free from that office & that I should try going to see someone at the Air Mauritius office in Port Louis. My time was such that I could not do this. Service is pathetic.