TOTAL LACK OF SERVICE

I AM STRUGGLING WITH MY Z10 FOR 3 MONTHS NOW IT WAS IT IS A VODACOM HANDSET AND WAS ON CONTRACT WITH VODACOM WE BLACKLISTED IT AS WE THOUGHT IT WAS ****** RECOVERED IT DID THE WHOLE PROCESS VODACOM REQUIRES TO UNBLACKLIST IT AND STILL IT DOES NOT WORK ON NA VODACOM NETWORK IT WORKS WITH ALL OTHER NETWORKS NOW BUT NOT ON VODACOM WAS IN THE BRANCH MULTIPLE TIMES EVENTUALLY WAS SENT TO REPAIR CENTER AND CAME BACK WITH NO DIFFERENCE AGAIN VISITED THE BRANCH AND HAD MULTIPLE PHONE CALLS TO CALL CENTERS WHERE BLAME WAS SHIFTED FROM ONE TO ANOTHER NOW THEY TELL ME MY WARRANTY EXPIRED IF IT WAS SORTED OUT THE FIRST TIME IT MY STILL HAVE BEEN WARRANTY EVEN THOUGH I DONT THINK ANYTHING IS WRONG WITH THE PHONE FOR HOW DOES IT WORKS ON ALL OTHER NETWORKS CURRENT JOB NUMBER IS ***2