3rd warranty claim and now it's physical damage.

I first brought my Samsung S5 mini in for repair on the 16th March (CS-***) for failure to switch on/Charge it was repaired I collected it.<br> <br> Second time was on the 2nd of May (CS-***) Same problem and same routine.<br> <br> 3rd time (at which time i'm getting quite frustrated at this point) on the 06 August (CS-***) Same Problem, but now i'm told it's physical damage. in which I rep**** \it always had those scratches it has nothing to do with the device cause it's been in for the same issue 3 times"now It can not be done under warranty"