BAD SERVICE SINCE THURSDAY

i HAVE EXCHANGED MY EXPLORER AT THE LYNWOOD SERVICE CENTER. BECAUSE MY HDMI OUTPUT HAD A PROBLEM. THEY DID EXCHANGE WITH A REFURBISHED ONE AND PAID R700. IS WAS ALSO NOT WORKING AND THEY CHANGED IT AGAIN. SINCE THURSDAY 7 APRIL AFTER NUMEROUS CALLS TO MULTI CHOICE AND SHUNTING ME AROUND FROM POST TO PILLAR IT IS STILL NOT WORKING. EVERY TIME I CONTACT THEM THEN THEY PROMISE ME IT WILL UPDATE IN 2 HOURS AND NOTHING HAPPENS. EVERY TIME I PHONE IN IT COSTS ME EXTRA MONEY BECAUSE THE CANNOT SOLVE THE PROBLEM. I WAS ON THE PHONE WITH THEM NOW AGAIN AND WAS TOLD TO GO TO AN MULTI CHOUSE OUTLET. AND THIS IS FOR THE 4TH TIME NOW. I GIVE THEM MY SERIAL NUMBER ON EXPLORER AND MY SMARTCARD NO AND THEN THEY SAY THE 2 IS NOT PAIRING BECAUSE IT WAS EXCHANGED. HOW MANY TIME MUST I CALL AND DROVE UP AND DOWN ON ON OWN EXPENCES!!! ERROR CODE E 107-4