OBF- i need a new phone not a repaired phone

I ORDERED A PHONE ON THE 22.04.2015 NOTE 4, AND WAS COLLECTED 24.04.05.2015, DURING THE WEEKEND I HAD COMPLAINS FROM PPL WHO I WAS CALLING AND THOSE WHO WERE CALLING ME THAT THEY CANT HEAR ME PROBABLY, I WENT ON TO USE THE PHONE THINKING MAYB I WAS IN A NOSIY PLACE, BUT EVEN IN A QUIET PLACE PPL STILL COMPLAINED, SAYING IT SOUNDS LIKE AM ON THE FREEWAY, SO BEFORE MY 7DAYS OBF I TOOK THE PHONE BACK WHERE I WAS TOLD THAT THEY WILL CALL ME ON THE 02.05.2015 TO GIVE ME FEEDBACK AND STILL NO CALL, YDAY 04.05.2015, I WENT TO THE SHOP TO CHECK ON THE PHONE AND THE LADY TELLS ME VODACOM IN MENLYN IS NOT ANSWERING THEIR CALLS, I MEAN WANT KIND OF AN ANSWER IS THAT? THE REASON I BOUGHT A PHONE IS BECAUSE I NEED ONE NOW AM LEFT PAYING FOR A PHONE THAT I DONT HAVE?<br> I BELIEVE I SHULD GET A NEW PHONE AS THE DAMAGE ON THE PHIONE IS NOT CAUSED BY ME AND WILL NOT PAY FOR A NEW REPAIRED PHONE WHICH WILL STILL TROUBLE ME MONTHS DOWN THE LINE.<br> VODACOM NEEDS TO ISSUE ME A NEW PHONE WHICH IS WORKING WITH NO FAULTS,