UNABLE TO REPAIR OR REPLACE FAULTY HEADSET

NO LTE COVERAGE ON SAMSUNG GALAXY S6, PHONE HAS BEEN IN FOR REPAIRS TO POLOKWANE VODACARE TWICE. THE FIRST TIME A FIRMWARE UPGRADE WAS DONE, NEXT NO FAULT WAS FOUND. I DID A SIM SWOP, AND THE PROBLEM PERSISTS. I SEND THE PHONE TO THE VODACOM ADVANCED REPAIR CENTRE, SAMSUNG SAYS THE IMEI NR NEEDS TO BE REWRITTEN. THE PHONE CAME BACK TODAY FROM THE ADV REPAIR CENTRE WHERE THEY TESTED THE PHONE AND ONCE AGAIN NO FAULT FOUND. HOWEVER, WHEN I INSERT MY SIM CARD I ONLY HAVE GSM NETWORK MODE. VODACOM DOES NOT KNOW WHAT IS WRONG WITH THE PHONE, THEY DO NOT WANT THE REPLACE IT EITHER. I WOULD LIKE TO CANCEL MY CONTRACT, AS I AM PAYING A SERVICE WHICH I AM NOT RECEIVING. OR VODACOM MUST SEND ME A SIM CARD WHICH IS WORKING, NOTE THAT THE OTHER TWO SIMCARDS THAT I HAD, WORKED ON OTHER DEVICES. JUST NOT THE ONE IN QUESTION. VODACOM'S ESCALLATIONS TEAM DOES NOT CORRESPOND VIA TELEPHONE, NOR DO THEY ANSWER ANY OF MY EMAILS. I AM SICK AND TIRED OF CALL CENTRES, BEING TRANSFERRED FROM ONE PERSON TO ANOTHER, WHERE ONE KNOWS LESS THAN THE OTHER.<br>