Faulty Samsung Tablet

Brought a Samsung Tab 3 from Kloppers in August 2014. The tablet has a TWO year warranty on.<br> This year it started giving problems. It was repaired twice already. Not once was it working correctly after repairs. <br> <br> The first time, the tablet was tested by Kloppers's employees and they said there was nothing wrong with the tablet. A couple of days later the same problem occurred and it was taken back. They said that the software need to be updated which we had to pay for. A day after the software was updated the SAME happened. We were then told that the tablet needs a new motherboard. <br> <br> Currently we are still waiting for the tablet (after the third time that it was sent for repairs). It was taken in on the 29th of September. They phoned us on the 17th of October to inform us that a new motherboard was received. Apparently, the reason for the delay was given due to a fabric re-shuffle, and the necessary new part was sent to PE instead of George. This is unacceptable, the tablet is still under warranty and is more in for repairs, than not. I don't understand what the use of a warranty is if something like this happens.