Tablet sent 3 times for repairs

Dear sir/madam<br> <br> I have already sent my tablet three times for repairs for a charging defect and still my tablet is not charging. I requested that they replace my tablet since it was only purchased in November 2014 and ever since has never been functioning properly but they just keep repairing and there is no change in the device. I fetched my tablet yesterday after repairs once again and only to find out that changing it after 6 hours it is still at 60%. I am really fed up with Vodacom repairs as I have spent a lot of money on this device and the quality is pathetic or I was given a defective product.