HUAWEI TABLETS

LAST YEAR DECEMBER I RECEIVED MY TABLET HUAWEI 7 THAT WAS SOLD TO ME TELEPHONICALLY BY VODACOM CONSULTANT, I RECEIVED THE DEVICE 12 DECEMBER 2014 AND WHEN I TRIED TO INSERT THE SIM CARD IT STUCKED AND I TOOK MY DEVICE TO MENLYN REPAIR CENTRE ON TH 16/12/2014 (JOB ***1) IN ORDER TO REVOME IT, GOOD ENOUGH IT WAS SORTED AND THE CONSULTANT HELPED ME TO INSERT THE SIM CARD AND IT WAS WORKING, AFTER SOME FEW DAYS IT SHOWS NO SIM CARD THEN I HAD TO TAKE IT BACK 24/01/2015, AND BOTH THE ASSESSMENT IT THE VERDICT WAS THAT: TESTED AND NO FAULT FOUND. SO WHEN IT STARTED AGAIN TO SHOW NO SIM CARD I TOOK IT TO EASTGATE REPAIRS (JOB ***0) EVEN THE CONSULTANT THEY CHECKED IT WITH THEIR OWN SIM CARDS AND IT WAS NOT READING. NOW IM VERY MUCH SURPRISE THAT THIS DEVICE THEY FOUND THAT ITS DAMAGED AND THEY SAY I NEED TO PAY R2019 TO REPAIR, HOW SO BECAUSE IF I DID DAMAGE THE DEVICE THEY SHOULD HAVE DETECTED EARLIER, BUT TWICE THE SYSTEM THERE WAS NO FAULTY AND THE SAD PART IS THAT IM PAYING FOR THIS DEVICE AS I HAVE MADE A CONTRACT WITH VODACOM AND NOW WHEN I CALL THEM THEY TOLD ME THAT I HAVE TO COME AND COLLECT BECAUSE ITS NOT REPAIRED AND THEY ARE NOT EVEN GOING TO REPLACE IT. HELP