Damaged goods and unsatisfactory service

Good day<br> <br> I own a very faulty Samsung tablet. It has been in for repairs 3 times for not charging properly and it has never been fixed. I advised the Samsung technicians about this problem and they asked if I could email proof of purchase plus job cards for the phone, which I did. I had to make countless follow ups before they advised me that I need to have it analysed and serviced by a Samsung technician before they can submit for a new phone request. I took time off work to go to their repair centre in wood mead. I got a quality service card*** 26/5) stating my phone is in perfect condition. When I charged my phone overnight, I woke up and it was on 30%. I called the Samsung technicians and sent emails advising this, all I got was either, they are on lunch/not at work today or they will call back, which they never did. Last night I switched it off at 2000 and charged overnight. I woke up at 0630, switched it on and it was on 6%. My phone has been assessed three times by three different technicians for the same problem. My conclusion, the technicians are not qualified or Samsung sold me damaged goods. I am tired of running around to get it fixed, I need a new phone