UNABLE TO UPGRADE MY CONTRACT

ON THE 12TH OF JANUARY I WENT TO VODACOM IN SHELLY BEACH TO UPGRADE MY CONTRACT WITH VODACOM AND I WANTED A LAPTOP, I WAS TOLD THAT THEY DID NOT HAVE IT ON STOCK AND I WILL BE CONTACTED ONCE THEY HAVE STOCK, I RECEIVED A CALL ON THE 19TH OF JANUARY TO SAY MY LAPTOP WAS READY FOR COLLECTION. I WENT TO THE STORE ON THE 20TH O9F JANUARY, THE SALES PROCESSED THE UPGRADE I WAS ASKED TO PAY6 AN AMOUNT OF 150.00 AND I DID, SHE THEN CONTACTED THE CALL CENTRE AND SHE WAS ADVISED THAT I COULDN'T UPGRADE BECAUSE OF THE NEW SYSTEM THAT VODACOM IS USING AND I WAS ALSO TOLD THAT THEY CANNOT PICK UP0 ANY CREDIT RECORD ON MY NAME. I AM PAYING ON A MONTHLY BASIS AND MY CONTRACT WAS DUE FOR UPGRADE LAST YEAR ALREADY, WHEN I CONTACTED THE CALL CENTRE I WAS TOLD THAT THERE WAS NOTHING WRONG I CAN GO TO THE STORE AND DO MY UPGRADE BUT UNTIL TODAY I AM RECEIVING NO HELP FROM THE STORE...