Samsung handset handed in for repairs under warranty. Still not fixed after the period that they designated.

I handed in my Samsung handset in on 18/08/2017 at Samsung (Pandodox Pty Ltd) in Menlyn Pretoria service number *******303. The phone was still under warrantee and the consultant told me it would be a week to two weeks to get the phone repaired. It’s been more than 2 weeks now and whenever I phone to check up all they tell me is that they are waiting on parts and suddenly the timeline has been changed to 2-3 weeks. I have been phoning almost daily for the last week and Samsung Menlyn has told me more than once that they would follow up and come back to me, but no one has contacted me with any news on the status of my repair. I struggle to believe that they would need to wait this long for parts on one of Samsung’s most popular devices. Also I would like to enquire on how a phone screen replacement could cause the data of the handset to be lost as the consultant at Samsung Menlyn told me that the data would definitely be lost so I have to take the data backup option which is R285.00. I am very unhappy with the level of service. Please assist