TERRIBLE CUSTOMER SERVICE!!!

I took my phone in for repairs in November last year, after having it for +/- 8 months. Being under warranty still they promised to have it fixed ASAP, after about a week they contacted me to come collect my phone. After 10minutes of use it went back to doing the same thing as what I explained to them it was doing. Once again I took the phone in and waited another 3 to 4 days this time having showed the manager of the store exactly what the problem was and he acknowledged it. So they called again to say I can come and collect so I asked what has been done to the phone and they said the engineer has checked it and everything is fine. Are these engineers even qualified because it has come to a point where I need to be compensated in some manner for all the time wasted on this pathetic engineer saying the phone is fixed but it is not, money on phone calls following up for no actual success with the phone being in the same condition as it was last year. <br> HOW CAN I GET MY PHONE FIXED WHY IS IT SO HARD<br> <br> Job No. ***7<br> <br> Is it so hard to fix a phone or replace with same value or make some kind of plan so that I can use my phone again. Really pathetic Service and management .